... low air pressure 3.Suitable for many types of DTH Hammer 4.Water hole:two 5.Face type:Concave,flat, ... DTH Bits1.high and low air pressure down-the-hole drill bits 2.Low air pressure holeDia.:65-220mm3.High air ... DTH Bit can be suitable for many types of DTH Hammer, such as XL, Mission, COP, IR, Mach, Demag, SD, ... 14171528×Φ147×Φ1617.51658×Φ148×Φ1618.5 Down the hole hammer drill bits for IR COP Xl