ASP replacement locksets allow you to replace damaged ASP locks or convert your current handcuffs. ASP locksets are easily removable and are interchangeable with chain, hinged, or rigid ASP handcuffs. You can convert standard handcuffs into high security or training, etc. The locksets are color coded for easy identification. Standard 1 pawl locks are yellow (ASP81237). High security locks that require a special key are blue (ASP81238). European 3 Pawl (ASP81239) use standard handcuff key. Sold per each- you need 2 locksets to convert 1 pair of handcuffs. Keys not included.