What is the purpose of double locking handcuffs?

The purpose of double locking handcuffs is primarily to prevent the single strands from ratcheting any tighter on the suspect's wrists. This mechanism ensures that once the cuffs are secured, they cannot be inadvertently tightened through movement or struggling, which enhances the safety and comfort of the individual being restrained. This feature is critical for preventing additional injury or discomfort to the suspect, especially if they are in custody for an extended period.

Additionally, double locking helps protect the security officer and the agency from potential liability that could arise from improper restraint techniques. Understanding this function reinforces the importance of proper handcuff application as part of responsible security practices, emphasizing the need for training in equipment use and detainee safety.