When should the double-lock of handcuffs be applied?

The double-lock mechanism on handcuffs is an important security feature designed to prevent the handcuffs from being inadvertently tightened or loosened by the person wearing them. This feature becomes particularly significant in situations where there is a reasonable concern that a subject might try to manipulate the handcuffs, either to escape or to use them to cause harm to themselves or others.

Applying the double-lock ensures that the handcuffs remain secure at a predetermined size. This is crucial for maintaining control over the individual and preventing any potential escape attempts. A situation that heightens the necessity for using the double-lock includes interactions with subjects who may have experience with handcuffs, those known for escape attempts, or individuals who may exhibit unpredictable behavior.

While the other options may entail considerations for cuffing protocols, they do not align with the best practices regarding the application of the double-lock. The approach to safety and security dictates that the double-lock should specifically be applied when there are concerns about the potential for escape or manipulation of the restraints. This practice enhances the overall safety of both the officer and the individual being detained.