What is the function of the serrated edge on the cuff's interior surface?

• A. To anchor the chain
• B. To activate the double lock
• C. To fit the swivel
• D. To click into the pawl

Answer: (D)

That serrated interior edge is designed to click into the lock’s pawl. When the cuff closes around a wrist, the pawl drops into one of those serrations, creating a secure, ratchet-like hold that prevents the cuff from opening. The edge provides discrete engagement points, so the cuff stays locked until the correct release action lifts the pawl. Other features like anchoring the chain, fitting the swivel, or activating a double lock involve different parts of the mechanism and aren’t driven by this serrated surface.