Designed for small diameter drilling applications, the 1191VSRK hammer drill from Bosch weighs 4.2 pounds. The lightweight tool offers drilling capacities of up to 1½-inches in wood, up to 5/8-inch in concrete and up to ½-inch in steel. The tool can convert from rotation only to hammer drill mode with a flip of a switch. A variable-speed trigger enables users to adjust to a variety of working surfaces. A 360-degree auxiliary handle with built-in quick-release depth gauge allows users to quickly tailor the 1191VSRK to a number of applications.