The DEWALT DCH773Y2 is the industry’s most powerful cordless 2 in. SDS MAX combination rotary hammer. The FLEXVOLT® 2 in. Cordless SDS MAX Combination Hammer, with its durable and hard hitting German engineered mechanism, delivers category leading 19.4 Joules of impact energy. This combination hammer features the FLEXVOLT® 20V/60V MAX* 12.0 Ah battery pack for cordless freedom. Constant speed electronics allows the tool to maintain speed under load, even in the hardest concrete, while the patented E-CLUTCH ® system protects the user in bind-up situations by stopping the rotation of the bit in a bind-up situation. This tool is ideally suited for horizontal and downward drilling for #6 - #14 rebar dowel applications, core drilling up to 6 in. and chipping in any lower wall and floor applications. Active Vibration Control® technology also reduces vibration felt by the user for less fatigue and greater productivity. This tool comes Tag Ready™, so users and companies can attach the DEWALT Tag™ and track its location virtually anywhere via the DEWALT Tool Connect™ app. **Impact power = Impact energy x impact frequency.