... hold rock drill, hand hammer drilllow weight,reasonable structure,handy use and little air consumption. 6 hand-hold rock drill is ... use and little air consumption. Hand-hold rock drill, specificationsModelWeightkgLengthmmCyinder Dia.×StrokemmWorking pressureMPaImpact energyJImpact ferquencyHZAir comsumptionI/sYO151555058× ... -0.63≥30≥23≤47 hand held drill,hand drill,jack hammer drill ,hand hold rock ...