Set of 1/4"D Bi-Hex (12pt) profile thin walled impact flip sockets. Sizes: 8 x 10mm, 9 x 11mm, 12 x 14mm, 13 x 15mm, 5/16" x 3/8", 7/16" x 1/2". Also includes: 75 & 150mm 1/4"D extension bars with quick chuck end, ideal for use with cordless drills & drill drivers. Impact quality. Manufactured from chrome molybdenum. All supplied in a plastic storage case with a removable EVA foam tray.