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If you're taking off lug nuts or removing bolts up to 5/8 inch, the JSM-403 is the impact wrench for you. Delivering 250-foot/pounds of torque with an air consumption of 4-cubic feet per minute, this 1.2 inch impact wrench has good balance to give you better control of the tool. The free speed of the tool is 7,000 rpm and will need a minimum of 90 psi to operate properly.