1/2" AIR IMPACT WRENCH RP-7430 Description Front Exhaust, Twin Hammer mechanism has 2 identical hammers that deliver an instantaneous balanced blow, reducing vibration and transferring more torque to the drive end of the anvil than any other mechanism on the market. Twin hammer mechanism provides more power and smooth balanced blows. Model: RP-7430 Square Drive : 1/2" Free Speed : 7, 500RPM Working Torque : 420Ft-Lb(567N.m) Air Intel : 1/4"NPT Avg. Air Consumption : 5cfm (142/min) Air Hose : 3/8"ID Net Weight : 5.72Lbs(2.60Kgs) Capacity Bolt size : 5/8" (16mm) Overall Length : 7.3"(185mm) Sug. Air. Comp : 3HP Packing : 10Pcs