... .1. Integral drill steels (Integral Drill Rods)Shank H22x108mm, H19x108mm, standard hex, Bit diameters include 20-42mm.2. Tapered drilling tools ... degree taper) taper rods in most lengths.button bits, cross type bits and chisel bits with(6,7,11,12 degree taper).Bit ... pressure hammers CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for the atlas ...