The 3-in-1 Impact Flip socket allows for quick switching between drive sizes. For use on an impact driver, this versatile socket includes 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. Will also fit a Klein Tools screwdriver handles (Cat. Nos. 32303 and 32304).