What mechanism prevents the ratchet from working on handcuffs?

The double-lock mechanism is integral to the functioning of handcuffs by preventing the ratchet system from engaging further after the cuffs have been secured. When handcuffs are applied, the ratchet allows for the cuffs to tighten around the wrist, making it difficult for the restrained individual to escape. However, when the double-lock feature is activated, it immobilizes the ratchet mechanism, ensuring that the handcuffs cannot tighten any further. This is a crucial aspect of ensuring the safety and comfort of the individual being restrained, as it prevents injury and excessive discomfort.

This mechanism also serves to protect against unintentional tightening due to movement or struggle, which is essential in maintaining control and safety during restraint. Thus, understanding the role of the double-lock feature is vital for anyone working with handcuffs in a security or law enforcement context.