Pneumatic down-hole hammer, middle-low air pressure, no valve type structure, low air consumption Main Technical Parameters:TypeHole Dia(mm)Tool Dia ... -210.5-1.7450-80010-141400118Φ114,227 WC pneumatic down-hole hammer, middle-low air pressure, no valve type structure ... to your requirements. Or produce according to your requirement! Pneumatic down-hole hammer