1/2" Square Drive Stubby Pistol Impact Wrench Kit. Features a high torque output in a super compact design for access in confined or hard-to-reach areas. Aluminum housing and steel hammer case provide exceptional durability. Excellent weight and balance to reduce operator fatigue. A must for auto, diesel and aircraft mechanics. Kit includes case, five sockets (17, 19, 21, 22, and 24mm), 2" extension and air tool oil.