3M T-27, 4-inches Grinder Extended 28413 with guard to be used with 4-inches and 4-1/2-inches bonded, coated, and surface conditioning products. Removable side handle furnished with tool. Guard can be positioned for greater surface visibility. 3M gripping material molded-inchesto tool housing for greater operator comfort. Right angle steel gear head with grease fitting for-increased gear life. Rear exhaust. 3/8-inches to 1/4-inches Air-inlet Reducer-included. High torque grinders feature repositionable guards for improved visibility, steel gear heads for add durability and superior noise reduction. Powerful without excessive weight for improved operator comfort. 3/8-24 external thread size. 1 HP motor. 12000 maximum RPM.