Matco Tools Infinium Cordless 20V 1/2" Impact Wrench, Battery Included, Breakaway Torque: 1,300 Ft-lbs Of Max Loosening Torque, Motor System: 4-pole Brushed Motor, Control: Variable Speed Feathering Trigger, Impact Frequency: Operates At A Max 2,100 Impacts Per Minute w/ Free Spin Speed Of 1,650RPM