Die Grinder, Voltage 20V MAX*, Max. Speed 25,000 RPM, Grinder Orientation Straight, Switch Type Paddle, Battery Capacity 4.0 AH, Brushless Motor Yes, Cordless Tool Kit Contents (1) Bare Tool, (3) Batteries, (1) Charger, Accessory Free Tool Change No, Collet Size 1/4 In., Lock-Off Switch No, Lock-On Switch No, Brake Type None, Anti-Kickback Clutch Type None, Anti-Restart Technology No, Tether Style Not tether capable, Dust Sealed Switch No, Grip Style Barrel Grip, Application Grinding