The top spec D25891K 19 lb. SDS MAX L-Shape Demolition Hammer, with its hard hitting and reliable German engineered mechanism, delivers 15.5 joules of impact energy. With Constant Speed Under Load electronics, the D25891K is ideally suited for substantial demolition to concrete and masonry walls, floor and wall channeling, wall breaching, bushing for roughing surfaces, and removing plaster and tile from floors and walls. Variable speed dial allows you to reduce power for better performance in brittle substrate materials. DEWALT's SHOCKS-Active Vibration Control® system reduces vibration at the handles, compared to hammers without such systems. .