Feature:1. 1/4-inch Hex Shank Prevents Stripping During High Speed Drill Operation2. Super Strong Heat Treated Chrome Vanadium Steel for Normal & Impact3. Use - Sandblasted Finish4. Converts All Power Drills into Speedy Socket Drivers5. Applies to the screwdriver handle or electricSpecification:screwdriver tools (hexagonal hole or three jaw chuck can be)driven sleeve is used, can be the original hexagonal side afterinstallation on size into square size, which can be used for the installation of the sleeve, is a good accessories to convertDescriptionSize: inch Length1/4''*1/4''*50mm--1/4'' shank can be converted into 6.35 mm square3/8''*1/4''*50mm--1/4'' shank can be converted into 9.53 mm square1/2''*1/4''*50mm--1/4'' shank can be converted into 12.7 mm squareMaterial: Chrome vanadium steel cr-vQuantity: 1 set(3pcs)Package List:3 x Socket Adapter Hex Shank set