ASP replacement locksets allow you to replace damaged ASP locks or convert your current handcuffs from standard to high security, or vice-versa. The yellow locksets have standard single pawl locks and use a standard handcuff key. The blue locksets are high security and require a special key. The blue locksets will not open with a standard key. These are for ASP Ultra Plus handcuffs with the finger activated double locks and will not work on older models with standard double locks. For Ultra Plus handcuffs only. Locksets are sold individually.