Min. Order Reference FOB Price
50 Sets US$5.20-7.20 / Set
Product Description
Product Description 58PCS Drill Bit Set and Screwdriver Bits for Metal, Wood, Masonry Material Component (%) Hardness HSS 4241 C (0.9~1.0); Si(1.0~1.3); Mn(0.25~0.4); P(0~0.035); S(0~0.009); Cr(3.8~4.2); Mo(0.55~0.85); W(1.6~2.0); V (0.4~0.65); Co(0) 60-61.5HRC HSS 4341 C (0.83~0.93); ...