The 1-3/4-inch SDS Max Combination Hammer is a midweight, high-performance hammer that is powered by durable German-engineered mechanisms. It delivers 10.5 Joules 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 midweight design makes it ideally suited for high-performance, horizontal serial drilling for #5 - #8 rebar, dry coring up to 4 inch, chipping in any upper to lower wall, and bushing applications. The SHOCKS Active Vibration Control system reduces vibration felt by the user at the handles, compared to rotary hammers without this feature.