The Makita DGA900 Brushless Angle Grinder is powered by 2 x 18V Li-ion batteries NOT supplied in series to supply energy to the powerful 36V DC motor drive system It has an electronic current limiter for overload protection soft start and anti-restart function for ease of use Active Feedback Sensing Technology AFT shuts down the tool to protect the user if the rotation speed suddenly slows down Automatic Torque Drive Technology ATDT automatically changes the cutting speed according to load condition for optimum operation For added safety there is also an electric brake The ergonomically designed handle features a soft grip and there is also a large switch lever with lock off function Battery indicators help prevent over-discharge and overheating Bare Unit No Battery or Charger Supplied Specification No Load Speed 6000min Wheel Size 230 x 2223mm Bore Max Wheel Thickness 65mm Weight 80kg