... for business talks.About products1. Integral drill steels (Integral Drill Rods)Shank H22x108mm, H19x108mm, standard hex. Bit diameters include 20 ... 108mm, (6, 7, 11, 12 degree taper) taper rods in most lengths.A comprehensive range of button bits, cross ... , face design: Flat face, Drop centre, Normal and Retrac body.Tungsten carbide (Buttons): Spherical, Ballistic and Conical. (Threaded R32, R38, T38 ...