Our ultra-compact Palm Air Impact Wrench is a compact powerhouse that offers unmatched convenience and efficiency in tightening and loosening bolts in confined spaces. Just 3.4 in. deep, 2.5 in. wide, and 5.5 in. long, fits in the palm of your hand and allows you the access and reach to tackle any job with ease Patented dual cylinder air motor, deploying air more efficiently while generating more torque compared to regular air motors, and ultra-short twin hammer mechanism enable us to create this ultra-compact yet powerful impact wrench Multi-grip one-handle operation gives you the freedom to use a grip most efficient for the job at hand. Easy access large forward/reverse thumb dial 1/2 in. drive with 405 ft. lbs. of maximum reverse torque and 333 ft. lbs.