... use and little air consumption. hand hammer drill, rock drill,6 hand-hold rock drill is a tool for the secondary blasting ... structure,handy use and little air consumption. Hand-hold rock drill, specificationsModelWeightkgLengthmmCyinder Dia.×StrokemmWorking pressureMPaImpact energyJImpact ferquencyHZAir comsumptionI/sYO151555058× ... 4-0.63≥30≥23≤47 Hand-hold rock drill,hand drill,hand hammer drill Y19A