Variable speed reversing. 0 to 2400 RPM/0 to 3400 BPM. 1/2" square drive with detent pin retention. 1650 in./lb. (138 ft./lb.) of maximum torque for many fastening applications. Compact size and weight allow access into tighter areas and reduce user fatigue. Durable magnesium gear case and all-metal transmission for extended durability. Heavy-duty impacting mechanism directs torque to fastener limiting, torque reaction felt on the wrist. Kit includes 1 hour charger, 2 each 18V XRP batteries, and kit box.