... Rotary Hammer Drill 1.work in concrete,steel,stone 2.variable speed,360 auxiliary handle 3.3 function 4.1250/850W Rotary Hammer Drill electric hammer, electric drill ... ,Demolition hammerHammer Drill,Electric Drillworking in concrete, Steel, stone ... 1375pcs (Plastic box)/20Ft2850pcs (Plastic box)/40Ft Rotary Hammer Drill