Our Black Double Locking Handcuffs are sturdy and dependable and come with two keys. They are made of black steel and have welded chain links. The double locking feature allows you to lock the handcuffs down to prevent the detainee from closing the cuffs too tight on the wrist. The two handcuff keys are standard police size and will work on Smith and Wesson, Peerless, and Hiatts brands. Available in Black and Pink.