IRWIN Tools 1899889 Impact Performance Series Hex Shank to Square Drive Socket Adapter, 1/4-Inch Hex to 1/4-Inch Square, 6-Inch Length;

IRWIN Impact Performance Series socket adapters are engineered for maximum durability, performance, and long life with impact tools. They feature a ball-lock retention design for applications when quick-change is ideal. The body of the socket is forged for additional strength. They have a black oxide finish that resists corrosion and increases the life of the tool. Plus, with a 1/4" quick-change shank, they're designed to work with all types of impact drivers, and also fit securely in standard drill chucks.