Best-in-class power and the highest overload protection handle the toughest concrete drilling and demolition. The 1-3/4 in SDS Max® rotary hammer offers 8.8 ft-lb of impact energy along with 450 rpm and 2840 bpm for fast drilling and hard hitting performance in the toughest applications. Advanced Constant power Technology® electronics and a mechanical clutch enhance your control and the rotary hammer's long term durability. The anti-vibration system ensures safe comfortable use.