China Threaded Button Bits Parabolic or Hemispherical Buttons

Drill button bits: R32 thread button bit, diameter: 51mm to 76mm. R35 thread button bit, diameter: 48mm to 54mm. T38 thread butto bit diam. 64mm to 89mm. T45 thread button bit diam. 76mm to 102mm. T51 thread button bit diam. 89mm to 127mm. ST58 thread button bit diam. 89mm to 127mm. ST68 thread button bit diam. 105mmto 140mm. Reaming button drill bits diam. 102mm to 127mm. We could offer you other rock drilling tools, such as button bits, dth bits, dth hammer, dth drilling,