The drill body of the steel body pdc bits is made of a whole piece of alloy steel by machining, and the cutting teeth are made by welding the composite piece on the tungsten carbide material tooth post, and then the cutting teeth are inlaid on the drill body, and the diameter-preserving part is also inlaid with diamond blocks or other wear-resistant materials on the drill body. https://www.sml-pdcbit.com/products/steel-pdc-bit/All Rights Reserved