Each 3-in-1 Impact Flip Socket allows for quick switching between drive sizes. For use on an impact driver, these versatile sockets include three hex sizes: 5/16-inch, 1/4-Inch shallow (driver) and 1/4-Inch deep (bit holder). Rare-Earth magnet holds bits and hex head fasteners. Set includes 3-Inch and 5-Inch (8 and 13 cm) length blades that will, also, fit Klein Tools screwdriver handles (Cat. Nos. 32303, 32304, or 32308).