Bosch Bulldog Xtreme™ Rotary Hammers come in both D-handle and Pistol-Grip designs. Optimal drilling range in concrete is 3/16 inch to 5/8 inch with a solid bit capacity of 1 inch and thin wall core capacity of 2-5/8 inches. Other features include a soft-grip trigger handle and a 360-degree soft-grip auxiliary handle with built-in quick release depth gauge. A variable-speed trigger allows accurate bit actuation in addition to better control when removing fasteners or bound bits.