Handcuffs are a type of restraint used primarily by law enforcement to secure an individual's wrists together. They are typically made of metal and consist of two circular loops connected by a chain or hinge. Handcuffs are designed to prevent a person from escaping or using their hands to harm themselves or others. When applied, handcuffs can restrict movement, making it difficult for the wearer to use their hands effectively. They are often used during arrests or when transporting individuals in custody. The use of handcuffs is governed by laws and regulations to ensure the safety of both officers and detainees, as well as to protect individual rights.