Handcuffs are a type of restraint that is used to secure a person's wrists together. They are typically made of metal and are designed to be applied by law enforcement officers or other authorized personnel as a means of physical restraint. Handcuffs are also used in some recreational activities, such as role-playing or bondage. Handcuffs are typically used to prevent a person from escaping or to restrict their movements in some way. They are often used in conjunction with other restraints, such as leg shackles or waist chains, to further restrict a person's movements. In law enforcement, handcuffs are typically used to detain suspects or to transport prisoners. They are also used in some cases to protect the safety of law enforcement officers or to prevent a person from harming themselves or others.