Fetters, shackles, footcuffs or leg irons are a kind of physical restraint used on the feet or ankles to allow walking but prevent running and kicking. The term "fetter" shares a root with the word "foot". In humans, typically only prisoners or bondage fetishists will wear shackles. A shackled animal's typically either a dangerous animal or one prone to escape. Metaphorically, a fetter may be anything that restricts or restrains in any way, hence the word "unfettered". History The earliest fett… (More on Fetters)