The HD01 is ideal for just about any drilling job whether in rock concrete wood or masonry with 4200 bpm and 800 rpm. The hammer function can be turned off for efficient light drilling in wood and metal. The sturdy light-weight construction features a D-handle and assist handle making it easier to maneuver than a pistol-grip tool. The HD01 chuck accepts SDS Plus bits and accepts other common accessories with a standard SDS Plus shank. A geared drill chuck and adapter are available for use with common wood auger bits or twist drills. The HD01 has 3 modes of operation--drill mode (without percussion) hammer drill mode (drill with percussion) or hammer only mode (percussion only).