... air pressure 3.Suitable for many types of DTH Hammer 4.Water hole:two 5.Face type:Concave,flat ... DTH Bit can be suitable for many types of DTH Hammer, such as XL, Mission, COP, IR, Mach, Demag, ... passed through strictly inspection.High air pressure DTH BitsDTH Drill BitBit Dia.(mm)Gauge ButtonsFront ButtonsWeight(Kg)HD35(IR35 ... 147×Φ1617.51658×Φ148×Φ1618.5 Down the hole hammer drill bits for IR COP Xl