We have Makita HR2010 13/16-Inch Rotary Hammer, SDS, Variable Speed with Product Detail Torque limiting clutch disengages if bit jams Variable speed for precise bit control Easy bit change by merely turning chuck Accepts "SDS-Plus" bits Tough and durable design . The "Makita HR2010 13/16-Inch Rotary Hammer, SDS, Variable Speed" is best product for you. We recommended Makita HR2010 13/16-Inch Rotary Hammer, SDS, Variable Speed