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 in, 1/4 in shallow (driver) and 1/4 in deep (bit holder). Rare-Earth magnet holds bits and hex head fasteners. Set includes 3 in and 5 in (8 and 13 cm) length blades that will, also, fit Klein Tools screwdriver handles (Cat. Nos. 32303, 32304 or 32308).