DeWalt DT7508 1/2 inch x 1/4 inch Impact Adaptor-DEWDT7508QZ
Milwaukee SHOCKWAVE 1/2 in. Square x 1/4 in. Hex Impact Adaptor-48-03-4410 - The Home Depot
DEWALT DW2298 1/2-Inch Square to 1/4-Inch Adaptor Hex Rapid Load, Black : Amazon.co.uk: DIY & Tools
DEWALT Impact Socket Adapter 1/4 to 1/2 Inch 3-Pack Set Driver CHN DW2547IR 885911026390 | eBay
DeWALT® IMPACT READY® DW2547IR Hex Shank Socket Adapter, Black Oxide, Hex x Square Drive, 1/4 in Male Drive, 1/2 in Female Drive, Male x Male Adapter, Steel | Dillon Supply