Makita's 1/4 in SJS™ die grinder (model GD0800C) combines a powerful 6.6 A motor with motor and gear protection features for longer-lasting grinding performance. The GD0800C features a slide switch for increased convenience. The GD0800C is equipped with SJS™, an innovative mechanical system that allows the drive shaft to slip if the wheel suddenly catches or binds. SJS™ is engineered to help protect the gears and motor and extend grinder life. The GD0800C is powered by a 6.6 A motor that delivers 7000 to 28,000 rpm with soft start for smooth start-ups. The electronic speed control maintains constant speed under load and a variable speed control dial allows the user to match the speed to the application. Consistent with other models in Makita's expanding grinder line-up, the GD0800C features labyrinth construction, a Series of channels engineered to capture dust and debris and prevent contaminants from penetrating the gear box and front armature bearing for longer tool life. In addition, the protective zig-zag varnish seals the motor and bearings from dust and debris by creating a barrier under rotation.