... .material:hadifield steel 3.colour:blue 4:steel tooth bits 5.high quality Advantage of our products:1.stocks adequate, time delivery2 ... face, back cone hardfaced strengthening,back cone is inserted (tooth)Formation of applicationSoft to medium soft or In the soft formation has ... bits, drill bits, TCI bits,drilling bits, oilfield bits, steel tooth bits,drag bits, hammer bits, well bits and so on ...