... Using high quality steel and tungsten carbide tips “huasheng”brand rotary bits can be suitable for Bauer, Cat, Sany, Yutong, ... can produce all kinds of rotary bits, trenching bits, diaphragm wall cutters, big diameter bushing bits and flat bits according to customers' requirements. ... Welcome friends both home and abroad contact us.Conical Bits,Such as B47K17H, B47K17.5H, B47K19H,etc, and we ...