AT-5040 air impact wrench: Specifications: 1) Square drive: 1/2" 2) Bolt size: 5/8 " (16mm) 3) Free speed: 7, 000rpm 4) Max. Torque: 230ft/lb (32kg/m) 5) Air inlet (PT): 1/4" 6) Air hose (ID): 3/8 " 7) Average air consumption: 4cfm (0. 12m3/min) 8) Suggested air compressor: 2. 0HP AT-5053 air ratchet wrench Specifications: 1) Square drive: 1/2 " 2) Capacity bolt size: 1/2 " (13mm) 3) Free speed: 160rpm 4) Max. Torque: 50ft/lb (6. 9kg/m) 5) Air inlet (PT): 1/4 " 6) Air hose (ID): 3/8 " 7) Average air consumption: 4cfm (0. 11m3/min) 8) Suggested air compressor: 1. 0HP