Impact Driver, Drive Size 1/4 in Hex, Drive Configuration Hex, Max. Torque 2,000 in-lb, Voltage 18 V, Brushless Motor Yes, Free Speed 3,900 RPM, Impact Rated Yes, Impacts per Minute 4,400, Impact Sound Level Not Applicable, Drive Type Standard, Number of Speed Settings Continuous, Collett 1/4 in Hex, Cordless Tool Kit Contents Bare Tool, Number of Batteries Included 0, Battery Capacity 5.0 Ah, Battery Model No. Not Applicable, Battery Series M18 REDLITHIUM, Charger Included No