The set includes 1/4" hex shank adapters for 1/4", 3/8", and 1/2" square drive sockets, plus a 1/4" hex converter. Compact, easy to use, and convenient for toolboxes or vehicle repair kits. 🔧 Universal Impact Adapter Kit: 1/4" hex shank socket adapter setw orks with impact drivers, electric drills, cordless drills, screwdriver handles, and quick release bit holders.