... SKH137 tricone rock bit 2.material:hadifield steel 3.colour:blue 4:steel tooth bits 5.high quality ... resistance. 7.competitve price Detailed Product Description:Bit size8 1/2'' 215.9mmBit typeSKH116, ... cone hardfaced strengthening,back cone is inserted (tooth)Formation of applicationSoft to medium soft or ... bits, TCI bits,drilling bits, oilfield bits, steel tooth bits,drag bits, hammer bits, well bits ...