right|thumb|Hiatt type 2010 handcuffs. . thumb|A person handcuffed behind their back. Handcuffs are restraint devices designed to secure an individual's wrists in proximity to each other. They comprise two parts, linked together by a chain, a hinge, or rigid bar. Each cuff has a rotating arm which engages with a ratchet that prevents it from being opened once closed around a person's wrist. Without a key, handcuffs cannot be removed without specialist knowledge, and a handcuffed person cannot move their wrists more than a few centimetres or inches apart, making many tasks difficult or impossib
Handcuffs are restraint devices that secure a person's wrists together using two metal cuffs connected by a chain, hinge, or rigid bar, with a ratcheting mechanism that prevents removal without a key. They are significant because they severely limit wrist movement and mobility, making them effective for restraining individuals in law enforcement and correctional contexts.
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right|thumb|Hiatt type 2010 handcuffs. . thumb|A person handcuffed behind their back. Handcuffs are restraint devices designed to secure an individual's wrists in proximity to each other. They comprise two parts, linked together by a chain, a hinge, or rigid bar. Each cuff has a rotating arm which engages with a ratchet that prevents it from being opened once closed around a person's wrist. Without a key, handcuffs cannot be removed without specialist knowledge, and a handcuffed person cannot move their wrists more than a few centimetres or inches apart, making many tasks difficult or impossible.
Handcuffs are frequently used by law enforcement agencies worldwide to prevent suspected criminals from escaping from police custody.
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