1.Diamond bits 2.coal mining,many types ... cutter tools.1. Integral drill steels (Integral Drill Rods)Shank H22x108mm, H19x108mm, standard hex, Bit diameters include 20-42mm.2 ... . Tapered drilling tools (Tapered Drill Steel)Including:Drill rods with Shank ... hammers CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave ...