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