The 40 V Max XGT Brushless 1 3/16" AVT Rotary Hammer with interchangeable chuck, AWS capable, is a cordless concrete solution designed for heavy-load applications. It delivers the power, speed and run-time for corded demands, without the cord. The quick-change chuck allows for interchangeability from SDS-PLUS to 1/2" keyless chuck for utilization of straight shank bits. Powered by a 40 V Max battery with a Makita-built brushless motor that combine to deliver the power and performance required for heavy-load applications. It can deliver up to 135 of 3/8" holes using a fully charged 40 V XGT 4 Ah battery. The variable speed dial and trigger enable user to match the speed to the application. This hard-hitting performance is combined with advanced comfort and convenience features including Active Feedback-Sensing Technology (AFT), which electronically turns off the motor if rotation of bit is suddenly forced to stop. It is also equipped with Anti-Vibration Technology (AVT) for reduced vibration. More than just a padded handle, AVT is an internal counterbalance that uses air pressure to move counterweight pistons in the opposite direction of the drive piston to actively reduce vibration. In addition, the vibration-absorbing back handle and side handle are engineered to further reduce vibration. Power Type: Battery; Cordless: Yes; Number of Speeds: Variable; Maximum Rotation Speed (RPM): 850.