The DGA900 features the new Makita Active Feedback Sensing Technology which shuts down the tool to protect the user if the rotation speed suddenly slows down. This is coupled with Makita's Automatic Torque Drive Technology which automatically changes the cutting speed according to working conditions, ensuring optimum performance at all times. In addition, both grinders include the well proven soft start system that reduces risk for torque twist on initial start-up, and the electronic current limiter that also shuts down the tool through the electric brake if the drive is snagged. These are coupled with the anti-restart function which requires that the control switch to be returned to the off position and then back to run before the grinder will activate. Specifications Battery Voltage: Twin 18v (36v) Battery Type: LXT Li-ion Disc Size: 230mm (9") Bore Diameter: 22.23mm Max Disc Thickness: 6.5mm No Load Speed: 6,000rpm Noise sound pressure/power: 88/99dB(A) Noise K factor: 3dB(A) Vibration K factor: 1.5m/sec Vibration Surface Grinding: 7.5m/sec Vibration Disc Sanding: 2.5m/sec Features & Benefits Brushless motor Electronic current limiter for overload protection Soft start Anti-restart function Electric brake Active Feedback Sensing Technology Tool shuts down to protect the user if rotation speed suddenly decreases Automatic Torque Drive Technology Tool Automatically changes the cutting speed according to load condition Ergonomically designed handle Battery guard Large switch lever with lock off function Contents DGA900PT2 Cordless Angle Grinder Side Handle Lock Nut Spanner BL1850 5.0ah Battery (x2) Twin Port Battery Charger Carry Case.