... includes taper chisel bits, cross bits, button bits, tapered drill rods, integral drill steels, plug hole integral steels, pick rods, thread ... any rock drilling condition, it's hardly impacted by the model of drill rig and the rock performance. Generally, chisel bit is ... different alloy to extend the working life of the drill bits. Drill TypeBit diamater (D)TaperWhter hole(d)mmPart onmminCrossl Type ...