Stanley HD08 Hydraulic Rotary Impact Hammer Drill is ideal for just about any drilling job whether in rock, concrete, masonry, wood or metal. The powerful, high rate, hammer function makes it easy to drill in rock, concrete, masonry and other like materials. For drilling in materials such as wood and metal, the hammer function can be turned off. The sturdy, light-weight construction of the HD08 features a D-handle and assist handle that make it easier to maneuver than a pistol-grip tool. The HD08 comes standard with a chuck that accepts SDS Plus bits. A geared drill chuck and adapter are available for use with common wood auger bits or twist drills. The HD08 will accept other common accessories that have the standard SDS Plus shank. A depth gauge attachment is standard. A built-in flow control allows use of the HD08 on hydraulic circuits having 3-9 gpm/11-34 lpm flow. The unique system selector valve allows the HD08 to be used on open-center or closed-center hydraulic systems. Rotation Speed at 6 gpm 1175 rpm. Blows per Minute 4,500 at 6 gpm. Operating Pressure: 750-2000 psi. Flow Range: 3-9 gpm.