Handcuffs
Handcuffs are a type of restraint, often used by police to ensure suspects cannot escape or hurt anyone. They do this by securing a person's wrists together. They are usually metal and consist of two parts linked together by a chain. Handcuffs cannot be removed without the right key, and a handcuffed person cannot move their wrists more than a short distance apart. Usually they are put on behind the back.