DEWALT DW2547Ir 1/4-Inch Hex Shank To 1/2-Inch Socket Adaptor
The DEWALT DW2547IR 1/4-Inch Hex Shank To 1/2-Inch Socket Adaptor.  Impact Driver Rated Socket Adaptors - Best In Class Durability.  Drive Size: 1/4 in (hex), 1/2 in (square).  Commonly used by Mechanical Contractors - HVAC,  Deck Builders, General Contractors,  Overhead Garage Door installers.