Clejuso number 11 nickel plated handcuffs are the basic model in the Clejuso range but they are vastly superior to most handcuffs on the market.  The double locking mechanism is easily used by pushing a recessed button which is in the fixed half of the cuff.  Once this button has been pressed the handcuffs are completely locked until the key is used to release them.  As soon as you handle these handcuffs you realise they are a quality product.