Makita DGA463RTJ 18V 115mm Cordless Angle Grinder (2 x 5.0Ah Batteries) The Makita DGA463Z 115mm Cordless Angle Grinder gives convenience for grinding & cutting applications. Its Active Feedback sensing Technology (AFT) turns the motor off if rotation of the wheel is suddenly forced to stop. This model comes with 2 x 5.0Ah batteries and charger. Features: Brushless motor Variable speed control dial Anti-Restart function Electric brake Slide switch Electronic current limiter Battery fuel gauge Ergonomic soft grip Automatic torque drive technology (ADT): adjusts speed and torque during operation for optimum performance Active Feedback sensing Technology (AFT) : turns the motor off if rotation of the wheel is suddenly forced to stop Wire mesh intake covers are engineered to prevent debris from entering motor Lock on function Tool-less wheel cover Soft start Comes With: 2 x 5.0Ah BL1850 Batteries 1 x DC18RC Charger Makpac Type 3 Carry Case Specification: Wheel Diameter: 115mm Bore Diameter: 22.23 mm Max Wheel Thickness: 7.2 mm No Load Speed: 3,000 -8,500 rpm Switch Type: Slide Switch Vibration: Surface Grinding: 6.5m/s_ Vibration: Disc Sanding: 2.5m/s_ Vibration K Factor: 1.5m/s_ Sound Pressure: 79 dB(A) Sound K Factor: 3 dB(A)