DESCRIPTION: Voltage: 120 Volts, Amperage: 5 Amps, Watts: 550 W, Amp: 5, Chuck: Keyed 3-Jaw, No-Load Speed: 0-2900 RPM, Impact Rate: 0-46,400 BPM, Shank: Straight Capacities, Concrete: 5/8″, Steel: 1/2″, Weight: 3.5 Pounds, Maximum power: 550 Watts.