The Makita DGA463 is a 115mm (4.5"), slide switch, variable speed angle grinder powered by a Makita brushless motor giving increased power and speed for a longer tool life. For the most demanding applications, Makita's exclusive "Automatic Torque Drive Technology" or ADT technology, automatically adjusts speed and torque during operation for optimal performance. The DGA463 is ideal for grinding and cutting a wide range of materials including tile, concrete, pipe, conduit, and more. Another included feature is "Active Feedback sensing Technology" or AFT, that turns the motor off if rotation of the wheel is suddenly forced to stop. FEATURES: Electric Brake stops the grinding or cut-off wheel in 2 seconds or less for maximum productivity. Active Feedback sensing Technology turns the motor off if rotation speed suddenly slows or wheel is forced to stop. Automatic Torque Drive Technology adjusts speed and torque during operation for optimum performance. The BL Brushless Motor