... center type. 2.Premium quality nickel-alloy steel 5"high air pressure dth bits 1)Design in the form of four ... many types of DTH Hammer, such as XL, Mission, COP, IR, Mach, Demag, SD, Bulroc, Halco Mach, Digger etc. Parameter DRILL ... BITBIT,DIA.(mm)NO.AIR HOLESGAUGE BUTTONSFRONT BUTTONSWEIGHT(kg) DHD13028X16 4X14,3X14 15.0 13328X16 ...