Double Locks Feature :
- Handcuffs with double locks have a detent which when engaged stops the cuff from ratcheting tighter to prevent the wearer from tightening them.
- Tightening could be intentional or by struggling; if tightened, the handcuffs may cause nerve damage or loss of circulation.
- Also some wearers could tighten the cuffs to attempt an escape by having the officer loosen the cuffs and attempting to escape while the cuffs are loose.
- Double locks also make picking the locks more difficult.
- Double locks are generally disengaged by inserting the key and rotating it in the opposite direction from that used to unlock the cuff.