Metal key knobs Designed especially for Police and Fire agencies Made in USA With a lifetime guarantee, these Zak Tool training handcuffs are made of durable steel with a nickel finish that will last for years. A permanently fixed dial takes the place of a traditional key to release the lock. These handcuffs are mainly designed for the training of police academy cadets.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }