... tools.1.Integral drill steels(Integral Drill Rods)Shank H22x108mm, H19x108mm,standard hex, Bit diameters include ... ,R25,R28,R32,R38,T38,T45,T51)Shank adapters-carburized and manufactured with tight tolerances ... bit and flat cutter bits for excavate coal machine as the replacements of kennametal. Such as ... road planing bit for road milling machine and trenching machine. Shank dia:19.4mm,25mm,30mm,33mm, ...