DeWalt Impact Wrench Adaptor 1/2 Square to 1/4 Hex- impact wrench adapter 3/8 to 1/2 ,12/6/2021· DeWalt Impact Wrench Adaptor 1/2 Square to 1/4 Hex is rated 4.5 out of 5 by 17 . Rated 5 out of 5 by Anonymous from Very handy little thing Very handy in tight access points. Date published: 2021-06-12. Rated 5 out of 5 by bluemaul69 from Essential Adapter needed for work on the car to torque to specific settings.3/8"Female-1/2"Male Impact AdapterDetails. 3/8"Female-1/2"Male Impact Adapter. Converts 3/8" Female to 1/2" Male Square. Specifically designed for use with air or cordless impact tools. Coated with Black Phosphate- a rust-preventative compound that makes them resistant to corrosion. Extension with ball type retainer. Made in the USA.