Grinder Kit and Grinder Head Type Standard Head Grip Style Barrel Grip Voltage 18V DC Wheel Diameter 4 1/2 in 5 in For Wheel Type Type 1 Type 27 Brushless Motor Yes Battery Capacity (2) 6.0 Ah Cordless Tool Kit Contents (1) Bare Tool (1) Charger (2) Batteries Safety Features Adjustable Guard Anti-Kickback Clutch Switch Type Paddle Lock-Off Switch No Lock-On Switch No Brake Type None Switch Location Bottom Max Speed 8 500 RPM Minimum Speed 8 500 RPM