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The J138WA Air Impact Wrench from Proto is an incredibly powerful tool for both professional mechanics and DIY enthusiasts alike. With a maximum torque output of 170 ft/lb, this wrench can easily handle the most demanding fastening tasks. Its high-speed operation at 7,200 RPM provides increased efficiency and productivity while reducing fatigue on the user's hand and arm. The air impact wrench is designed for use with a variety of fasteners and materials, making it perfect for automotive, aerospace, manufacturing, and maintenance applications. Its lightweight, ergonomic design makes it easy to use in tight spaces or for extended periods of time. With its 3/8 drive size and bottom exhaust location, the J138WA is sure to become an essential tool in any user's toolbox.