Professional Leg Irons, oversized with double lock made in stainless steel.
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
The earliest fetters found in archaeological excavations date from the prehistoric age and are mostly of
the puzzle lock type. Roman times
already see a variety of restraint types. Some early versions of cup lock shackles can already be found.
These were widely used in medieval times but
their use declined when mass production made the manufacture of locks built into restraints affordable.
Simple fetter types continue to be used like puzzle lock shackles as the typical slave iron or irons riveted shut for prisoners being transported to overseas prison camps. The First built-in locks often were of a simple screw-type but soon developed into the "Darby" type. In Europe these continued to be used into the middle of the 20th century, whereas in the US from the late 19th century onwards many new designs were invented and produced before handcuffs and leg irons of the Peerless type became the standard several decades ago.
A recent development of the last few decades are high security restraints that incorporate a cylinder lock that is more difficult to pick than the lock on standard type cuffs.