Down the Hole (DTH) Hammer Bits - Drilling Supply
5 inch high Air pressure DTH bits(HD55/DHD350R/COP54/SD5/QL50/HM5) 133 140 146 152 165: 15 ~ 18.5: 6 inch high Air pressure DTH bits(HD65/DHD360/COP64/SD6/QL60/HM6) 152 165 178 190 203: 26 ~ 36: 8 inch high Air pressure DTH bits(HD85/DHD380/COP84/SD8/QL80/HM8) 195 203 216 254 305: 33 ~ 95
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