Shanaxi hai nai sen Petroleum Technology Co.,Ltd [China]

With professional and productive factory, HAINAISEN is one of the leading China other non-coring drill bits manufacturers. Welcome to wholesale other non-coring drill bits from us, we always have cheap products to offer you. Name: Surface inlay man-made diamond (set on the surface) drill bits Article No.: RBW Feature: Man-made diamonds are setting on the surface of the body. It is affordable to drill the hardness rock. http://www.pdcoiltool.com