1.the head of tungsten carbide tip is fired by vacuum; 2.Specification: U76, U95, U135, U765, etc 3.Coal mining bit holder Coal mining tools U95HDLR-HFPhysical Description: Forged Steel Body, made of 42CrMo or better, special heat treatment to meet high toughness & wear resist character. Hardfacing if required, Low pressure sintered carbide with suitable grade according to Target Projects, PDC ...