What is the purpose of the Jaw portion of the handcuff?

The jaw portion of the handcuff is designed to secure the subject's wrists effectively. It features a mechanism that allows the handcuff to close tightly around the wrists, preventing the individual from escaping or easily manipulating the restraints. The jaws are the parts that come together to encircle the wrists, ensuring a snug and secure fit. This is critical for maintaining control and security over a detained individual.

While the keyhole is an important feature of handcuffs for locking or unlocking purposes, it is not the primary function of the jaw. Likewise, connections to chains and adjustment features pertain more to the overall design and usability of the restraint but do not define the main purpose of the jaw itself.