... drilling equipments. Our firm produce the corollary equipments which match with the products from well-known manufacturers, such ... 36mm,40mm,42mm,44mmThread Drill Bits---Diameter: 51mm to 127mmThread Type---R22,R25,R28,R32,R38,T38, ... T38,T45,T51Down-The-Hole Tools1) DTH BIT---65MM to 254mm.2) DTH Hammer---76MM /90MM /110MM 3 ... Drill Rod---H19/H22, Length: 0.5M to 6.0M.Thread Rod---R25,R28,R32,R38, ...