Double offset ring wrenches, chrome vanadium steel, galvanized chrome finish. 8 pieces set, sizes: 6 x 7, 8 x 9, 10 x 11, 12 x 13, 14 x 15, 16 x 17, 18 x 19, 20 x 22 mm. includes modular series organizer box compatible with tool trolley ref. 21325