drill tips/button bit/button bits/ rock drill bit/ drill bits/rock ... , 32, 34, 36, 38, 40, 45 (mm)We are a professional production Rock Drilling Tools, offering different kinds of Rock Drilling ... /button bits/chisel bits/cross bits/sandvik/atlas copco/drill tips/rock drill bitsModel Taper DegreeDiameter Length No. of buttons & Type ...