This set of 8 impact driver socket adaptors is designed for use with Impact Drill/Drivers. The 1/4" Hex shank drive allows for compatibility with drills, drivers, and screwdrivers. The adaptors feature a spring ball lock for a secure fit and are made from hardened Chrome Vanadium (CR-V) with a phosphate finish for enhanced strength and protection. The set includes 1/4" Hex Shank to 1/4" Square Drive adaptors (25, 30, 50, and 65mm long), 1/4" Hex Shank to 3/8" Square Drive adaptors (50 and 65mm long), and 1/4" Hex Shank to 1/2" Square Drive adaptors (50 and 72mm long). They are suitable for all Impact Drill/Drivers and feature a universal 1/4" Hex shank.