Die Grinder Kit Voltage 18V DC Max Speed 27 000 RPM Grinder Orientation Straight Switch Type Slide Battery Capacity (1) 5.0Ah Brushless Motor Yes Cordless Tool Kit Contents (1) Bare Tool (1) Battery Accessory Free Tool Change No Collet Guard Type None Collet Size 1/4 in For Wheel Dia 2 in Speed Ranges 0 to 27000 RPM Minimum Speed 27 000 RPM Number of Speed Settings 1 Lock-Off Switch No Lock-On Switch Yes Brake Type Electronic Anti-Kickback Clutch Type None