... H22x108mm, H19x108mm, standard hex, Bit diameters include 20-42mm.2. Tapered drilling tools (Tapered Drill Steel)Including:Drill rods with Shank H22x108mm,(6,7,11 ... low pressure hammers CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for ... 25mm,30mm,33mm,38mm,etc.8. Blast furnace tap hole drill tools.(Rod, Cross type bits, button bits and X type ...