Bosch Model 1821 5" Rat Tail Grinder is the best in it's class and is the pro's clear cut choice. This powerful and durable grinder has a 2-position vibration control handle and a rear handle trigger with lock-on/off switch for extended use applications. The epoxy coated field windings, sealed switch and Service Minder™ brushes keep your mind on the job and not tool maintenance. AC/DC capability extends the versatility and the tool-free adjustable guard makes wheel changes quick and easy.