... tools.1.Integral drill steels(Integral Drill Rods)Shank H22x108mm, H19x108mm,standard hex, Bit diameters include ... rods with Shank H22x108mm,(6,7,11,12 degree taper) taper rods in most lengths.button bits, cross ... R22,R25,R28,R32,R38,T38,T45,T51)Shank adapters-carburized and manufactured with tight tolerances ... straightness.4.Down the hole hammers and DTH button bits(Down The Hole Drilling)Offer ir ...