With the top quality of alloy steels imported from USA and the best carbides made in China, we produce all retract threaded button bits by hot press technology.

Thread size: R32, SSR32, R35, SSR35, R38, T38, T45, T51, SST58, SST68, SGT60.

Diameter: 51mm to 152mm.

Face tape: Flat front, Drop center front, Uni-face