For tagging purposes this tag refers to metalcuffsused for restraint of the arms or legs, typically used in a dungeon or prison type setting when not used as an accessory. They're similar to the cuffs used under thehandcuffstag, but are depicted more solid, wider, and frequently depicted as simply a solid band of metal around the leg or arm.  They may be attached to something else, such as a wall or aball and chain restraint.Oniare typically seen wearing shackles.
shackles