Brand new, first quality, in retail packaging. This is MIT (Michigan Industrial Tools, the owner of Tekton), #1231, 9 Piece, 3/8″ drive, Deepwell, 6 Point, Chrome Plated, Drop Forged Carbon Steel, Metric Socket Set. High quality, made in Taiwan.Includes metric sizes: 10, 11, 12, 13, 14, 15, 17, and 19 mm and a snap in storage rail.