The Bosch HD19-2B Two-Speed Hammer Drill features a muscular 8.5-amp motor that handles all masonry drilling applications, delivering a max of 51,000 bpm for productivity in concrete drilling. This tool features a torque-control auxiliary handle with a built-in depth gauge. The handle securely locks into place for great user control. The drill's dual-mode selector easily converts from rotation-only to hammer-drill mode. Its rotating brush plate allows users to easily back out bound-up bits. It has two speed settings, one for high speed and one for high torque. Because of its heavy-duty three-jaw 1/2-in. chuck, the tool has a high clamping force that that prevents drill bits from slipping. This robust drill has a metal front housing for longer life, a pistol-grip handle with soft-grip design and an integral slip clutch for security against recoil.