1/4 (6.35 mm) SQ. Socket Set of 25 Set Contents: 2400M Hex Sockets 4, 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13 2400A Hex Socket 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 1/2 Accessories: 2753N, 2760-100, 2769N-150, 2770, 2785