HomeSupplier Discoveryarrow-rightTools & Hardwarearrow-rightWrencharrow-rightAdjustable Tool Factories & Companies
Filter
Category
More
Management Certification
More
R&D Capacity
Annual Revenue
More
No.of Employees
More
Province & Region
More
about adjustable tool
  • Technological Innovation
  • Reliable Supply Chains
  • Substantial Manufacturing Capabilities

adjustable tool10,000+ factories verified

Hangzhou Hongtu Machinery Equipment Co. Ltd.

12 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Engine Timing Tool, Car Removal and Installation Tool, Chassis Tools, Oli Change Tool, Car Testing Tool, Hand Tool
Country/Region:
Zhejiang, China
R&D Capacity:
ODM Service
Sample Service:
Sample Available
Company Profile:
Hangzhou Hongtu Machinery Equipment Co., Ltd, was established in 2012, is a domestic and foreign trade cooperation in production, transit trade enterprises, the company mainly produces engine timing tools, auto repair tools, chassis tools, testing instruments, hardware tools, ete. Focuson product development, production and sales. Adhering to the attitude of responsible for every customer, we choose high-quality materials, after several years of rapid development, we have two mature brands. Since its establishment, the company has been strictly in accordance with the modern enterprise system management, Relying on the flexible market operation mechanism, we continue to provide customers with quality products and services. While developing new products, we can fulfill various business orders. At present, the company's trade scale is expanding, customers all over the world, with a good reputation to win the trust of domestic and foreign customers, in order to promote the modernization of China, promote economic and technological exchange with the world's various countries, enhance the friendship with the people have made a lot of positive work, And has a number of agents, wholesalers throughout the country, won the trust of customers and praise, High quality, high efficiency, low cost management mode is the common pursuit of you and our development goal, we will do our best to provide customers with quality products and quality service, the company adhering to the core mission of the enterprise: Integrity, quality, efficiency and service. With high quality, reasonable price and perfect service, we sincerely welcome friends from home and abroad to visit and negotiate business.

Yueqing Derui Tools Co., Ltd.

16 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Automatic wire stripper, Hand crimp tool
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Derui Tools Co., Ltd. is a distinguished manufacturer specializing in high-performance hand tools, with a strong emphasis on crimping tools, wire strippers, and cable cutters. What sets us apart in the industry is our unwavering commitment to innovation and quality, backed by our status as the only crimping tool factory in China with an independent laboratory. This unique advantage allows us to conduct rigorous testing, refine designs, and ensure that every product meets the highest standards of durability, precision, and efficiency.

Shanghai AMC International Trading Co., Ltd.

21 yrs
·Trading Company
Main Products:
Handware, Hinges, Hardware, Hand Tools, Tools, Hammer, Plier, Measuring Tape, Screwdriver, Screws
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Established in 1999, Shanghai AMC Int'l Trading Co., Ltd. Are engaged in manufacturing and exporting wide range of hardware, hand tools and other related products, such as hinges, locks, bolts, drawer sliders, knobs, bibcocks, valves & fitting, wire ropes, as well as various tools like hammers, axes, pliers, wrenches, saws, screwdrivers, jack planes, measuring tools, cutting tools, clamps, vices, drills, plumbing tools, tool kits, power tools, hydraulic jacks, V-belts etc.

Shenzhen Voda Tech Co., Ltd.

13 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Stove Fan, USB Fan, Stove Accessories, Air Purifier, Tower Fan, Camping Stove, Stove Thermometer, Dehumidifier, Wood Fireplace Bellows, Stove Lamp, Metal Stamping Parts
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
VODA Technology Co., Ltd. Was established in 2008, which is a professional factory specializing in the design, development and manufacture of fireplace accessories, such as stove fan, moisture meter, stove thermometer, tools set, coal bucket, stove brush, stove gloves as well as relevant supporting purchasing services. Our products are exported to the United States, Canada, Australia, Spain, France, Sweden, Denmark, Germany, UK and other European countries. We have an individual team of well experienced QC staff and many high-educated technical engineers who work throughout the whole manufacturing processes i. e. Incoming raw materials, production, final output to ensure our products are of high-quality assurance standard. To better serve our clients and meet their increasingly higher requirements, we have passed the ISO9001-2008 quality control system certification. High quality products, reasonable price, prompt delivery, superior service ensure marketing competitiveness, Our company has earned high reputation from customers of home and abroad, we are looking forward to cooperating with global partners sincerely, Let's get our company development and grandness with old and new customers together.

Zhangjiagang Dongzhen Hardware Tools Co. Ltd.

Main Products:
High-Grade Hair Scissors, High-Grade Pet Scissors, Power Tools, Hand Tools, Pliers, Wrench, Tabe Measure, Screwdriver
Country/Region:
Jiangsu, China
R&D Capacity:
OEM Service
Sample Service:
Sample Available
Company Profile:
Doz Tools is a leading manufacturer and supplier of high-quality hand tools and hardware tools, specializing in an extensive range of pliers and wrenches. With a commitment to excellence and innovation, Doz Tools prides itself on providing professionals and DIY enthusiasts with reliable tools that make every job easier.

Tianjin Myriad Families Technology Co., Ltd.

7 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Air Compression Massager, Leg Massager, Waist Massager, Massage Gun, Foot Massager, Recovery Booots, Cold Therapy Systems, Water Cycling Pads
Country/Region:
Tianjin, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Tianjin Myriad Families Technology Co., Ltd. is a premier manufacturer specializing in high- end innovative equipment for rehabilitation, physiotherapy, and healthcare. Headquartered in Tianjin, we offer integrated solutions encompassing research and development, design, production, and sales. Our main products include air compression massagers, leg massagers, waist massagers, massage guns, cold therapy systems, cuffs, water cycling pads, and other physical therapy and rehabilitation equipment. With years of expertise in research and manufacturing, we deliver high- quality massage products at competitive prices. Quality is our faith and dignity, embedded in every product. Supported by advanced technology and comprehensive experimental facilities, we ensure continuous innovation and stringent quality control throughout the entire development and production process. We hold I S O 9 0 0 1 quality management system certification. In addition, many of our products have obtained major international certifications such as the European Union's C E, L V D, E M C, RoHS, and Reach, as well as U. S. F C C certification. We serve a global market, with products exported to more than 30 countries and regions across Europe, North America, Southeast Asia, Australia, and the Middle East. Through years of growth, we have established a synergistic operational model that integrates global production and marketing with a diversified service portfolio spanning wellness recreation, experiential services, sports rehabilitation, and home- based physiotherapy. Our mission is to enhance well- being and enrich lives worldwide through innovative and accessible healthcare solutions. Looking ahead, we are committed to expanding our user-centric intelligent health ecosystem. This is powered by our dedicated and sustained investment in research and development.

Qingdao Jiuying Formwork & Scaffolding Co., Ltd.

Main Products:
Formwork, Scaffolding, Trench Box, Building Materials, Steel Structure
Country/Region:
Shandong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Qingdao Jiuying Formwork & Scaffolding Co., Ltd. is a standout high-tech enterprise, boasting a robust foundation in independent innovation core technology and intellectual property rights. The company excels in a comprehensive spectrum of services, seamlessly integrating research and development, design, manufacturing, sales, leasing, installation, and after-sales support for building templates and lifting frames.

Anhui Huaxia Machine Manufacturing Co., Ltd.

23 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Plate Rolling Machine; Press Brake; Guillotine Shearing Machine; Laser Cutting Machine; Ironworkers
Country/Region:
Anhui, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
With series of bender, shearing machine, rolling machine, punching machine and forming dies as its main products, Anhui HuaXia Machine Manufacturing Co. Ltd. Provides special machinery and complete sets of equipment for a wide range of industries including aviation, light industry, metallurgic industry, metalworking, architecture, automobile, power industry, decoration engineering and so on. Its clients are found all over China and other countries and regions in Europe, America, Southeast Asia and Middle East. We have built offices in different parts of China, which forms a huge sales network and offers guarantee for convenient after-sales services. Besides, we have Wuhan Huayin electromechanical equipment subsidiary company in Hubei province, which deals in various kinds of famous brand electromechanical equipment.

Tangshan Xieli Conveyor Belt Transport Equipment Co., Ltd

25 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Pull Cord Switch, Conveyor Belt Scraper, Slip Detector, Level Switch, Limit Switch, Belt Sway Switch, Audible and Visual Alarm, Material Flow Detector, Belt Alignment Device, Conveyor Cover
Country/Region:
Hebei, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Tangshan Xieli Conveyor Belt Transport Equipment Co., Ltd (referred to as "Tangshan Xieli Group"), formerly known as Tangshan Xieli Conveyor Belt Transport Equipment Co., Ltd., was founded in 2002. After more than20 years of deep cultivation and development, it has formed a group management mode of group company and multiple subsidiaries, With long-term exploration and accumulation in the field of belt conveyors, we provide customers with a complete set of solutions such as emergency protection, unmanned operation, and system engineering transformation. Our business scope covers many fields such as metallurgy, electricity, cement, chemical, port, mining, coal, papermaking, etc. We are a leader in the subdivision of bulk material transportation in China, Its brands are renowned both domestically and internationally, with business coverage in over 30 countries and regions worldwide.

Hebei Kangnayipin Sports Equipment Co., Ltd.

20 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Basketball hoop/Table tennis table/Badminton post/Badminton net/Outdoor fitness equipment
Country/Region:
Hebei, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
He production workshop covers a vast area of over 20, 000 square meters, laying a solid foundation for efficient and high-quality production processes. The entire production area is scientifically planned and meticulously divided into multiple functional zones, aimed at ensuring that production efficiency and quality reach industry-leading standards.

Softool Manufacturing Co., Ltd.

9 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Tools and fixtures, CNC cutting tools
Country/Region:
Tianjin, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
SofTool was founded on a commitment to precision and industrial innovation, and has grown into a respected name in the global metal cutting industry. With advanced R&D capabilities, stringent quality systems, and intelligent manufacturing, we provide high-performance cutting tools and complete machining solutions that help manufacturers improve efficiency, ensure quality, and move toward intelligent and automated production.

Hangzhou Bella Medical Instruments Trading Co., Ltd.

7 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Liposuction Cannula, Mercedes Liposuction Cannula, 30 Hole Harvest Cannula, Lantern Liposuction Cannula, The Scream Cannula, Submental Canula, One Hole Cannula, King Frank Cannula, Re-Injection Cannul
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Hangzhou Qiandao Medical Equipment Co., Ltd.

Ningbo Jingli Machinery Manufacturing Co., Ltd.

7 yrs
·Manufacturer/Factory
Main Products:
Ratchet tie down; Headache rack; Tool box
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
JINGLI located near Ningbo Port. As a professional manufacturer integrating R&D, production, and sales, JINGLI specializes in a diverse range of products, including ratchet tie-downs, industrial straps, lifting slings, ratchet buckles, hooks, headache racks, corner protectors, aluminum alloy products, and laser products, etc.

Yangjiang Yingpo Technology Co., Ltd.

4 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Aluminum Alloy Triangle Ruler, The Upgraded Cutting Machine's Reliable Support, Round Corner Cutting Mold, Handle Installation Positioning Gauge, Aluminum Alloy Cabinet Door Auxiliary Device, Aluminum Alloy Quick Clamp, Right Angle Clamp, Side-Mounteddrawer Clip, Handle-Free Grooving Template, 35mmhinge Positioning Hole Punch
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
IMBOT is a professional manufacturer and supplier of hardware tools in China, specializing in R&D, production, and OEM/ODM services.

Falin Manufacture Co., Ltd.

3 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Manual Riveting Tools, Pneumatic Riveting Tools, Hydraulic Riveting Tools, Automated Riveting Systems, Accessories & Consumables
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
China Falin Manufacture Co., Ltd. is a professional manufacturer of pull riveting tools, with a professional technical research and development and quality control team. Our company has passed ISO9001, ISO14001, ISO18001 management system certification. Our company has always been adhering to the "professional manufacturing sustainable management" principle, with rigorous and perfect production process and scientific management concept, dedicated to riveting fastening system business

Shanghai Bomu Import and Export Co., Ltd

6 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Bending Mould, Riveting Machine, Mould Cabinet, Press Brake Machine, Press Brake Tooling, CNC Bending Machine Mold, Precision CNC Bending Machine, Amada Press Brake Mold
Country/Region:
Shanghai, China
R&D Capacity:
ODM Service
Sample Service:
Sample Available
Company Profile:
BoMu is a specialized manufacturer of CNC bending machine molds and mechanical tools. Since its establishment, the company has developed the ANRDA brand series of molds, gaining recognition in the industry for precision, quality, and reliability. With over 20 years of production experience, BoMu has built a strong foundation supported by a team of professional designers and skilled technicians. Our company is equipped with various large-scale processing machinery and state-of-the-art CNC processing equipment, ensuring efficiency and excellence in every product we deliver.

Shanghai Bojin Electric Instrument & Device Co., Ltd.

Main Products:
Surgical Power Tools, Sternum Saw, X-ray Instrument, Medical Power Tool, Oscillating Saw, Portable X-ray, Surgical Saw, Surgical Drill, Orthopaedics Tool, Medical Drill
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Established in 1993 and headquartered in Shanghai, Bojin, as an advanced orthopedic equipment manufacturer and solutions provider, Bojin focuses on the development and marketing of orthopedic-purpose motor products, X-ray imagescopes, treatment apparatus, and supporting surgical tools/parts. It has more than one hundred types of orthopedic products under 8 series, which have received QC certification of 3C, ISO9001, ISO13485, CE of the EU, and FDA Registry 3008787426. Its mission is to satisfy the needs of patients and medical care with innovative high-tech products and therefore become a promoter of people's orthopedic health. It has built a healthy sales and services network thanks to its 200 dedicated employees in the marketing companies or teams in more than 4countries and regions across North America, Europe and Asia. Its products are used in more than 125 countries and, in particular, in more than 20000 Chinese medical institutions 70% of which are 3A-rated hospitals. Bojin respects professionalism and talents and values core technology R&D. Its R&D team accounts for up to 20% of its staff, for it is fully aware that its top-notch professionals provide for the healthy operation of the company, the steady supply of high-quality medical equipment and comprehensive services for its global customers. Its innovation in products and solutions reduce social medical costs and therefore lessen the financial burden of patients. In the spirit of valuing life and health, Bojin, with a strong sense of social responsibility, are dedicated to innovating technology and upgrading product quality, thus ultimately helping improve the health of larger population. Its development is, as always, dependent upon technological innovation, common endeavor of the staff, and constant improvement of management philosophy. Each step forward has witnessed the staff's resilience and entrepreneurship, which, in turn, promotes the company's development and fortifies the staff's confidence in the company's prospect.

Tianjin Easy Scaffolding Co., Ltd.

9 yrs·4.8
·Manufacturer/Factory & Trading Company
Main Products:
Scaffolding Ringlock System, Scaffolding Metal Plank, Scaffolding Frame System, Scaffolding Kwikstage System, Scaffolding Cuplock System, Scaffolding Coupler, Scaffolding Accessories, Scaffolding Prop, Formwork and Accessories
Country/Region:
Tianjin, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Tianjin Easy Scaffolding Co., Ltd is a scaffolding manufacturer and export company.

Taizhou Xuanma Tools Co., Ltd.

15 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Wrench
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Taizhou Xuanma Tools Co., Ltd., located in Zhejiang Sanmen Coastal Industrial District, covers an area of 28 acres. It manufactures and sells high-grade wrenches. It has 150 employees, including 8 senior engineer, 5 technical personnel, and 1 manager graduated from Duke's Fuqua School of Business. Xuanma has a strong technical force, and advanced production equipments. Xuanma accompanies their customers in their international developpement, by adapting their product and services offers to their local or global requirements.

Pingyuan Haotian Machinery Co., Ltd.

14 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Tool Holder, Collet, CNC Machine Vise, Drill Chuck, Chuck, Live Center, Clamping Kit, Parallel Block Set, ER Wrench, ER Nut, Pull Stud, Boring Head
Country/Region:
Shandong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Pingyuan Haotian Machinery Co., Ltd(HT-TOOLS Machinery) is located in the largest production base of machine tool accessories in China. We have advanced equipment and a strong technical team as backing support. Continuous innovation, honest and trustworthy cooperation and win-win business philosophy.

Dezhou Drillstar Co., Ltd

14 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Tunsgten Carbide, Deep Hole Drilling Machine, Deep Hole Drill Bit, CNC Lathe, Deep Hole Honing Machine, Carbide Mill, Carbide Reamer, Deep Hole Dill, BTA Drill Head
Country/Region:
Shandong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Dezhou Drillstar Company Limited was established in 2013 and is located in Dezhou City, Shandong Province. Dezhou Drillstar Company Limited is a high-tech enterprise specializing in the R&D, production, and sales of deep hole machining. We have built a complete industrial chain from materials to finished products, providing, not only various grades and specifications of cemented carbide bars, insert blanks, strips, blocks, and other cemented carbide products such as wear-resistant parts tungsten carbide, tunnel boring machine tungsten carbide, oilfield tungsten carbide, mining tool tungsten carbide, cemented carbide coal cutting teeth, rotary drilling teeth, tungsten tungsten carbide, Stellite tungsten carbide, and wrought high-temperature tungsten carbide, but also, leveraging our material advantages, customizing high-performance precision machining tools for our customers. Our products include single-sided alloy welded drill guns which can be modified into mechanically clamped drill guns, double-edged drill guns, alloy one-piece drill guns, stepped-edge drill guns, BTA drill bits, drilling tools, deep hole scrapers, honed grinding heads, boring heads, and gun reamers, etc. Meanwhile, the company provides various types of deep hole machining tools, including CNC deep hole drilling machines, deep hole boring machines, deep hole punching machines, deep hole broaching machines, CNC lathes, machining centers, and used machine tools to meet the processing needs of different customers. We are your trustworthy one-stop solution partner.

Yongkang Suntec Electric Appliance Co., Ltd.

6 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Cordless Tools
Country/Region:
Zhejiang, China
R&D Capacity:
ODM Service
Sample Service:
Sample Available
Company Profile:
Suntec electric Appliance Co., Ltd. is a professional manufacturer of Li-ion tools. Located in Yongkang of Zhejiang province, Suntec enjoys great advantages of best resources including the production technology, R& D ability and the talented persons. The company has a sound industrial production base, with modern industrial plants and first-class production and testing equipment; At the same time, Suntec have an complete experienced and energetic team composed of Purchasing Department, Marketing Department, Sales Department, R& D Department and Quality Department.

Xiamen Zhongying Electronic Technology Co., Ltd.

5.0
Main Products:
Plastic Products, Rubber Ring, Sealing Ring, Gasket
Country/Region:
Fujian, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
 Xiamen Zhongying Electronic Technology Co.,  Ltd is a specialized manufacturer of high-quality injection molded plastic products and silicone rubber components. With years of industry experience, we serve as a trusted manufacturing partner across the automotive, medical, consumer electronics, industrial equipment, and household appliance sectors. We offer both OEM services-accurately producing components from customer-supplied samples, drawings, or existing tooling-and ODM services-providing in-house design and engineering support to bring new product concepts to market.

Hebei Zhengyang Hardware Technology Co., Ltd.

Main Products:
Spanner, Socket, Spanner Set, Socket Set, Needle Nose Pliers, Long Nose Pliers, Hand Tool Set, Automotive Hand Tools, Cutting Disc, T Handle Socket Wrench
Country/Region:
Hebei, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Hebei Zhengyang Hardware Technology Co., Ltd., established on November 4, 2025, is located at No. 56, West Side of Chuangye Avenue, Economic Development Zone, Guangzong County, Xingtai City, Hebei Province. Its main business includes hardware product research and development, manufacturing, wholesale, and retail; Manufacturing and wholesale of auto parts and accessories; Sales of auto parts; Bicycle manufacturing; Non-ferrous metal alloy manufacturing; Sales of metal products; And import and export of goods.

Henan Dajia Mining Machinery Co., Ltd.

14 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Mining Machinery, Construction Machinery
Country/Region:
Henan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Henan Dajia Mining Machinery Co., Ltd., established in 2000, is a large-scale comprehensive enterprise integrating R&D, manufacturing, and sales of engineering equipment. Located in Zhengzhou, a national central city in China, the company has experienced nearly 20 years of rapid development. With strong technical capabilities, complete processing equipment, and comprehensive testing methods, we specialize in the research and manufacturing of road machinery, tunnel shotcrete support equipment, bridge equipment, engineering grouting pumps, and mining engineering equipment. Through countless improvements, we have achieved precision quality, stability, and reliability. We offer 8 major product series and over 100 product models, providing one-stop pre-sales, in-sales, and after-sales service, serving the global market.

Hebei Ouyang Safety Tools Co., Ltd.

Main Products:
Non-Sparking Safety Tools, Non-Sparking Wrenches, Non-Sparking Chain Hoist Block, Steel Impact Socket, Hammer, Pliers, Stainless Steel Wrenches, Titanium Hand Tools, Insulated Hand Tools, 40 Cr-V Steel Hand Tools
Country/Region:
Hebei, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Founded in 1983, HEBEI OUYANG SAFETY TOOLS Co., Ltd has been a professional manufacturer for Non-sparking, Non-magnetic Safety Hand Tools (also known as spark resistant hand tools), which made by special Aluminum-Bronze (Al-Br) or Copper-Beryllium (Cu-Be) alloys for safe use in Ex zones where hazardous, flammable or combustible vapors, liquids, dusts or residues may be present.