The Steel Air ½” Air Impact Wrench is a high performance impact wrench with plenty of power. This impact is great for any skill level, ranging from the weekend warrior, DIY all the way up to the professional mechanic. The ½” impact is great for changing tires or rotating tires. Specifications: • Free Speed:------------7000 rpm • Max Torque:------------220 ft/lb • Operation Pressure:----90 psi • Minimum Hose Size------3/8" • Air Consumption--------4 cfm • Air Inlet--------------1/4"