shackle that consists of a metal loop that can be locked around the wrist; usually used in pairs

Handcuffs are restraint devices designed to secure an individual's wrists close together. They comprise two halves, linked together by a chain or hinge. Each half has a rotating part which engages with a ratchet which is closed around a person's wrist.

A dream of being handcuffed is a promise of release from worry. To see others handcuffed signifies security and protection.

Appliances... that are... just for fun. Now I suppose you're Interested.