Electronic variable speed control dial (120 - 240 RPM)LED light indicates when to replace carbon brushesBall clutch torque limiter ensures stable torque control and stops the tool if the bit hits rebarOne-touch sliding chuck for easy bit installation and removalIncludes both straight and D-handle optionsLarge rear D-handle for two handed operationAccepts SDS-Max shank rotary bits and hammer steelNo hammering when idling protects the hammering mechanism for a longer tool lifeExternally accessible brushes for fast jobsite replacement12 bit angle settings adjust the hammer steel to the desired positionLarge, easy to operate triggerDouble insulated