ROTARY HAMMER ,MOD:2415 (ZIA-TK-24 DFR), Three functions,high power. ... times 0~4500/min Rated input power 780W Popular ROTARY HAMMER MOD:2415 ZIA-TK-24 DFR Max hole opening24mm / Concrete13mm ... safety,the clutch will be break off by itself. Rotary Hammer 2415