Why is the double-lock feature important for handcuffs?

The double-lock feature is crucial for handcuffs primarily to prevent over-tightening. When handcuffs are applied, they can sometimes be tightened excessively, which may cause injury to the person being restrained. The double-lock mechanism allows the user to secure the handcuffs in place after they have been properly adjusted, ensuring that they do not tighten further as the individual moves or struggles. This feature promotes safety for both the person being restrained and the officer, as it reduces the risk of harm and potential legal repercussions related to improper restraint.

The other choices, while relevant to general handcuff use, do not specifically address the primary benefit of the double-lock feature. Enhancing security relates to securing a suspect but does not particularly focus on the way the handcuffs are adjusted. Restricting movement is a fundamental function of handcuffs themselves rather than a specific benefit of the double-lock mechanism. Shortening the length of handcuffs does not apply because the design of handcuffs is fixed in that regard; they are meant to fit snugly without altering the inherent structure. Thus, the focus on preventing over-tightening highlights the distinguishing advantage of having that double-lock feature in handcuffs.