Handcuffs are a type of restraint used by law enforcement to secure an individual's wrists together. They are typically made of metal and consist of two circular cuffs 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 commonly used during arrests or when transporting individuals in custody. The use of handcuffs is regulated by laws and policies to ensure the safety of both officers and detainees.