Ingersoll-Rand 111 The Knuckle Saver 3/8-Inch Super Duty Reactionless Air Ratchet Wrench 3/8-inch super duty air ratchet features unique reaction-less mechanism. Makes gearing unnecessary; absorbs kickback when the nut runs tight Provides 50 ft./lbs. of maximum torque Rear exhaust directs air away from work 1-year limited manufacturer's warranty