The Bosch GWX18V-50PCN 18 V EC brushless connected-ready 4-1/2 to 5 in angle grinder features the X-LOCK mount, offering a wheel change interface that's up to 5X 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 grinder's EC brushless provides greater efficiency that maximizes runtime and productivity. The grinder provides an X-Brake, which helps provide a rapid stop of the wheel when the switch is turned off. It also includes other advanced electronics, such as drop control, kickback control, restart protection and soft-start technology. The grinder has connected-ready capability, supplying an interface that works with the optional Bosch connected tool module to link to the free Bosch toolbox app and to the blue hound system.