Powermate Tools 3/8" Reactionless Air RatchetThe 3 8 in. reaction less ratchet wrench is perfect for work in confined areas such as engine and radiator maintenance where fingers and hands are at risk. The reaction less impact mechanism absorbs kickback, protecting operator's wrist from fatigue and or injury. It also minimizes pulling of operator's hands eliminating knuckle cuts and hand injury. Pin clutch impact mechanism to eliminate kick back Front exhaust directs air away from user Easy