Dual purpose for hammering only or rotation with hammering electronic variable speed control dial (130 to 280 RPM) for easier hole starts powerful 13.5 AMP motor with 12.5 joules of impact energy and 1,250-2,750 blows per minute. Large concrete capacity of 5 In. with core bit. Soft start electronic switch for smooth starts and constant speed control. One-touch sliding chuck for easy bit installation and removal. Anti-vibration technology reduces vibration and operator fatigue. LED light indicates when to replace carbon brushes, and if there's a problem with the switch or power source. Ball clutch torque limiter ensures stable torque control. Side grip swivels 360. Externally accessible brushes for quick and easy jobsite serviceability. Includes both straight and D-handle options. No hammering when idling extends the life of the tool. Large comfortable trigger switch. Accepts SDS-Plus shank hammer steel bits.