The DEWALT D25481K 1-9/16" (40mm) SDS MAX Combination Hammer Kit features a durable and hard hitting German engineered mechanism that delivers 6 joules of impact energy for fast drilling, even in the hardest concrete. The light weight design makes it ideally suited for horizontal serial drilling for #4 - #8 rebar, coring and chipping in any mid to upper wall and ceiling application. SHOCKS - Active Vibration Control technology reduces vibration felt at the handles for less user fatigue and greater productivity. Specifications: Optimal concrete drilling: 1/2" - 1-1/8", Amps: 10.5amps, Vibration measurement: 9.4 m/s², No Load speed: 540 rpm, Blows/Min: 3,150 bpm. Includes: 1) Hammerdrill, 1) Carrying case