Bosch HD21-2 Speed Hammer Drill, Blue 9.2 Amp motor-best in class power provides maximum performance/durability for drilling in a wide variety of materials such as concrete, wood or metal 360 Degree torque control side handle with built-in quick release depth gauge-side handle Metal gear housing-for long life and jobsite durability the competition 2-Mode selector-easily converts from hammer drill mode to rotation only mode 2-Speed-Select high speed (concrete) or high torque (wood, metal) drilling applications