40V max XGT Brushless Cordless 13/16-inch Rotary Hammer (model HR010G) is a cordless concrete solution designed for heavy-load applications. It delivers the power (2.1 J, 1.5 ft. lbs), speed, and run-time for corded demands, without the cord. The variable speed (0 - 1,350 RPM & 0 - 5,000 BPM) dial and trigger enables the user to match the speed to the application. Constant speed control automatically applies additional power under load for optimum performance. The torque limiting clutch is engineered to prevent gear damage by automatically disengaging the gears if the bit binds, and constant speed control automatically adds power to the motor to maintain speed under load to complete the most demanding jobs. It has 3-modes of operation "Rotation Only", "Hammering with Rotation" or "Hammering Only" for multiple applications. It accepts SDS-PLUS bits. Use with optional DX16 Dust Extraction Attachment (Sold Separately) for dust-free operation.