... Drill Steel)Including:Drill rods with Shank H22x108mm,(6,7,11,12 degree taper) taper rods in most lengths.button bits, cross type bits ... and chisel bits ... pressure hammers CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for the atlas ...