The KING TONY 12A1MRN is an 11-piece combination spanner set that is designed for use in electronic and automotive applications. The set consists of one each of the following: 8, 9, 10, 11, 12, 13, 14, 15, 17, 19, 21mm sizes. The long, flexible wrenches have both an open-end and a ring head for working on fasteners of all sizes. The set is made of a heat-treated alloy steel that provides strength and durability, and the finish prevents rust and corrosion. The set also comes with a wall-mountable box that provides easy storage and organization for the wrenches.