The top spec D25901K 22 lb. SDS Max Demolition Hammer with SHOCKS provides high performance without overheating. The hard hitting and reliable German engineered mechanism, delivers 19 joules of impact energy and a non-air pumping beat piece to extend tool and seal life by eliminating dust from entering the unit. DEWALT's SHOCKS-Active Vibration Control system reduces vibration at the handles, compared to hammers without such systems. A large rocker switch makes it easy to power on and switch off.