Grinder, Bare Tool, Voltage 20 V DC, Wheel Dia. 5 in, 9,000 RPM No Load RPM, Cordless Tool Battery Type Li-Ion, Brushless Motor Yes, Switch Type Paddle, Lock-on No, Lock-off Yes, Tool Length 12 1/4 in, Battery Included Bare, Speed Type Single, Battery Pack Replacement Mfr. No. DCB609, Spindle Thread Size 5/8 In.-11, Tool Weight 3.9 lb, Features FLEXVOLT Advantage(TM)Kickback BrakeBrakeE-Clutch(TM) E-Switch Protection(TM)Tool Connect(TM) Chip Ready, Includes 4 1/2 in. T27 Guard Wheel Flange