The Bosch GWX18V-8 is an ergonomic X-LOCK angle grinder that combines portability, performance and best user comfort. Its brushless motor provides equivalent 8.0 amps of power and greater efficiency that maximizes runtime and productivity. It features the X-LOCK mount, offering a wheel change interface 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. This 4-1/2 In. 18V grinder has restart protection to help prevent accidental start-up when switching batteries, soft-start technology to reduce startup torque and ease into cuts, and overload protection to reduce the risk of the motor overloading or overheating It is designed with spiral bevel gears that provide smooth transmission of power to grinding applications. It also features an adjustable tool-free guard and an updated gearhead mounting collar, which is now compatible with all Bosch metal and concrete cutting guards. This tool features a two-position side handle and a slim soft-grip design.