Milwaukee 3/8 in. Square x 1/4 in. Hex Shockwave Impact Adapter 48-03-4405 - The Home Depot
Klein 7/16-Inch Adapter for 90-Degree Impact Wrench - BAT20LWA
Bestgle 1/2-20UNF Mount 1.5-13mm Capacity Key Drill Chuck for Air Impact Wrench Converter Conversion Tool with Chuck Key and 1/2 inch Socket Square Female Adapter - - Amazon.com