G10 jack hammer,with strong impact,is suitable for drilling in the quarries, mines, concrete, asphalt or any other frozen object G10 Jack Hammer1 ... , destroying hard orfrozen stratum and other athletics occasions which needed impact.2. Product Specifications: Length575mmWeight10.9kgsCylinder38mmStroke155mmWorking Pressure0.63MpaImpact Energy43JImpact Frequency16HzAir Consumption26L ...