Min. Order Reference FOB Price
20 Pieces US$0.50-5.00 / Piece
Product Description
Tungsten carbide drill bits for hardened steel The tungsten carbide twist drill bit is the type produced in largest quantity today. It comprises a cutting point at the tip of a cylindrical shaft with helical flutes; the flutes act as an Archimedean screw and lift swarf out of the hole. The ...