The other end of a handcuff key acts as the what activator?

• A. Key end/flag
• B. Teeth
• C. Double lock activator
• D. Swivel

Answer: (C)

Two things a handcuff key does: unlock the lock and set the double-lock. The far end is built to activate the double-lock mechanism on the cuffs. When engaged, the double lock prevents the cuffs from tightening further around the wrist, which helps keep the restraint from becoming too tight and reduces injury risk while ensuring the restraint stays in place. The other options don’t describe this function: the primary end handles unlocking, while terms like teeth or swivel refer to parts of the cuff or chain rather than the key’s activating role. So the correct description for the other end is that it serves as the double-lock activator.