... , Normal and Retrac body.Tungsten carbide (Buttons): Spherical, Ballistic and Conical. (Threaded R32, R38, T38, T45, T51 ; bit diameter: 45mm ... bits for shield machine and construction tools.7. Round road planning bit for road milling machine and machine.Shank diameter=19 ... 33mm, 38mm, etc.8. Blast furnace tap hole drill tools. (Rod, Cross bits, button bits and X-type bits etc). conical pick tools