The Streetwize 11-piece combination spanner set is made from chrome vanadium, a steel alloy that is hardened and is resistant to abrasion, oxidation and corrosion. The set is finished in a mirror polished nickel chrome plating and comes in a folding plastic rack for easy storage. Made from chrome vanadium steel Mirror polished Nickel chrome plated finished Sizes: 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 19mm Folding plastic rack