Handcuffs are used in sex play to restrain one partner's wrists or ankles. They are comprised of two metal bracelets linked together with a chain. The handcuffs used in sex play may also be covered with a soft material to prevent chafing.
Handcuffs can be tied in different ways: wrist to wrist, wrist to object, ankle to ankle, or ankle to object. The ratchet mechanism prevents the cuff from being removed without the key.