The 1-3/4 in SDS Max combination hammer is a mid weight, high performance hammer that is powered by durable German engineered mechanisms. It delivers 10.5 J of impact energy for fast drilling and chipping, even in the hardest concrete. Constant speed electronics allow the tool to maintain speed under load, while the patented E-Clutch system helps protect the user in bind up situations by stopping the rotation of the bit. The mid weight design makes it ideally suited for high performance, horizontal serial drilling for #5 to 8 rebar, dry coring up to 4 in, chipping in any upper to lower wall, and bushing applications.