Double open end wrench, chrome vanadium steel, galvanized chrome finish. 11 pieces set, sizes: 6-7, 8-9, 10-11, 12-13, 14-15, 16-17, 18-19, 20-22, 21 x 23, 24 x 27, 30 x 32 mm. includes modular series organizer box compatible with tool trolley ref. 21325