Proto J199WP Air Impact Wrench, Full Size, 1 in Drive, Pistol Grip, Square, 1 2 in NPT Air Inlet, Std G2740744 Internal Jaw Spread Maximum Internal Jaw Spread Maximum 12 in Includes Locking Mechanism Yes Country of Origin United States 8 to 19 mm Deep Socket Style Size 1 2 in Excellent Power to Weight Ratio Rubber bumper for durability Tool Support hangers for use with balancers Additional Features: 2 Stage Trigger for more control Adjustable Side Handle Included Comfort grip for low vibration Compact size for tight spaces 7 m sq sec Built In Light No Tool Life Long Lasting Air Inlet Type NPT Air Pressure Minimum 90 psi Air Pressure Maximum 90 psi Drive Shape Square Bolt Capacity Maximum 3 in Frequency of Use Frequent Maintenance to Heavy Production Power Source TS Only Air Powered Power Source old Air Powered Country of Origin Taiwan