Anodized color-coded aluminum sockets with magnetic core for easy use. Surface drive technology for better grip and less rounding. Knurled speed ring for quick removal and installation. Serrated edges for added grip on hard to reach fasteners.Drive: 3/8 in.Pieces: 7 qty.Handles : Gear Ratchet qty.Metric Socket Size: 13 (Red Plug), 14 (Green Plug), 15 (Purple Plug), 16 (Gold Plug), 17 (Black Plug), 19 (Blue Plug) mm.Storage Type: Molded Storage Case.Fits most domestic and import vehicles .