The Zak Tool ZT-13 Pocket Handcuff key is available in a variety of colors and features a standard key design that is compatible with all standard series makes & model handcuffs. Each key is manufactured from a tough, heat treated stainless steel and are designed in such a fashion to provide an indefinite period of service. Zak Tool is so confident in the materials and craftsmanship employed, that they provide an unlimited lifetime guarantee. Made in the USA.