The Makita DHR171 LXT SDS Plus Rotary Hammer has 3 modes of operation: rotary drilling, hammer drilling or chiseling. The Makita hammer is fitted with a one-touch sliding chuck for easy bit installation and removal. While the variable speed trigger enables the user to match the speed to the application for greater versatility. For added user safety there is an electronic brake. The rotary hammer has a compact and ergonomic design which is easy to handle. While the vibration absorbing handle moves independently of the motor, and hammer mechanism, for increased operator comfort. There is also a built-in LED light. No Load Speed: 0-680/min. Impact Rate: 0-4,800/bpm with 1.2 joules. Capacity: Concrete 17mm, Steel 10mm, Wood 13mm. Bare unit, with no battery or charger included.