The DEWALT DCH172 Ultra-Compact XR SDS Plus Rotary Hammer has a brushless motor for extreme run time and reduced maintece. The 2-mode operation allows for either Rotary Hammer or Rotary Only modes. Compact, lightweight and ergonomic design for improved comfort and support during extended operating periods. A bright white LED with a delay feature improves visibility. There is also a convenient tether point so you can keep it secure when working at height. Specification Modes Rotary Hammer, Rotary Only No Load Speed 1,060/min. Impact Rate 0-4,980/bpm Max. Impact Energy 1.4 joules Capacity Wood 16mm, Concrete 16mm, Metal 10mm, Optimum Drilling Range 4 - 10 mm Weight 1.8kg (without battery)