14 pieces with magnet in the sleeves for secure retention of the nut during assembly. Supplied in an impact resistant case with EVA insert. Lengths 5-13 mm = 45 mm, 14-17 mm = 65 mmContents:Magnetic sleeves 5, 5.5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17 mm and 1/4"