Makita USA, Inc. has released three new angle grinders: 9564PC(4-1/2-in.), 9565PC (5-in.) and 9566PC (6-in.). The three grinders are powered by a Makita-built industrial 13 amp motor. The units are built for masons, welders, fabricators and more. The Super Joint System stops the wheel, minimizes grinder kickback and protects the gears. The units grinders also feature a labyrinth construction, which seals the motor from exterior dust and debris by creating a complex set of channels and prohibiting contamination.