Bosch HD19-2B 1/2-Inch 2-Speed Hammer Drill Bosch-built High-output-8.5 Amp Motor 1/2-Inch 3-Jaw Chuck-For rugged hammer drilling applications Dual-mode Selector-Easily converts from rotation only to hammer drill mode Patented rotating brush plate-Provides equal power in reverse to easily back out bound-up bits and doubles brush life Pistol-grip Handle-Compact ergonomic design with soft-grip