1/2" Air Impact Wrench, Super Duty, 500 ft-lb Torque, Friction Ring Retainer, Pistol. The 244A Series ½” Impact Wrench comes loaded with a steel hammer case, square socket retaining ring, vane motor and metal housing — making this wrench one of the toughest, most durable impact wrenches on the market. Increased Control: The power regulator on the 244A Series provides you with increased control and stability on even your toughest projects. Durability: Tough and durable, the metal housing and steel hammer case on the 244A Series will help it hold up through repeated drops and harsh environments. Two-Piece Construction: Easy-to-service two-piece construction. Comfort and Control: Contoured handle for comfort and control. Patented one-hand forward/reverse for easy operation. Pressure Feed Lubrication: Pressure feed lubrication system automatically greases the impact mechanism.