caol mining bit using high quality steel and tungsten carbide tips via forging,welding and heat treatment to make the Product caol ... of "Quality first,Reputaion first",and sincerely wish to cooperate with friends from domestic and overseas in technical coordination,new product ... development,making on client's samples and drawings.We can also supply the following Bits and Holders:U82,U84,U85,U92,U95 ...