... product has passed ISO9000/2000 3.round shank BETEK cutter bits 1.Ours rotary bits can be suitable for Bauer,Cat,Sany,Yutong ... can design all kinds of rotary bits,trenching bits,diaphragam wall cutters,big diameter bushing bits and flat bits according to customers' requirements and ... geological conditions.4.We can supply the following bits and holder:B47K-22H,5030-22H,3060-22H,B47K-19H ...