Rock drill bitton bits including Taper drill bits and thread drill bits. And the thread drill bits including R25,R28,R32,R35,R38,T38,T45 ,T51,ST58,ST68 and GT60 thread types, the diameter from 35mm to 152mm suitable with different sizes thread drill rods. They can be used on Tunneling and drifting, Underground drilling,surface drilling etc. 
And the Normal drill bits have flat face, drop center face, concave face etc. and the buttons including round buttons, ballastic buttons, spherical buttons,concial buttons etc. 
All of the tungsten carbide inserts diameter, materials, quantity etc can be customized by your working conditions and special request.
We also provide free print service and you can choose the color by your request and even can add your own logo and part numbers. We also provide free packing service and we have plastic case, wooden case, carton or customized by your request.
Finally, we also provide completely after-selling and after-using service.Why not Choose us ?