The Bosch GWX13-50VSP 5 In. X-LOCK Angle Grinder Variable Speed with Paddle Switch features the X-LOCK mount, offering a wheel change that's up to five times faster than conventional interfaces. There?s an audible snap when mounting an X-LOCK wheel on an X-LOCK grinder. The wheel mounts properly without the need for a spanner wrench or flange nuts. The wheel is released from the grinder with the pull of a lever. The angle grinder delivers maximum power ? 13 amps and 11,500 rpm. It has a variable-speed setting ? 2,800 to 11,500 RPM ? allowing the user to match speed to application. Equipped with epoxy-coated field windings and direct-motor cooling, this grinder is built for a longer tool life. It features spiral bevel gears for smooth transmission of power. It has a Vibration Control auxiliary handle for additional user comfort and an adjustable tool-free guard.