1) Physical restraint 1) Prison 
A method of securing captives by means of a metal bar to which shackles be fixed. This is what we means when we say Clap him in irons.
Bilboes (always plural) or grillos are iron restraints normally placed on a person`s ankles. They have commonly been used as leg shackles to restrain prisoners for different purposes until the modern ages. Bilboes were also used on slave ships, such as the Henrietta Marie. According to legend, the device was invented in Bilbao, Basque Country wit....
• (pl. ) of Bilbo
Leg irons attached to the deck of a ship.
Bilboes are an apparatus for confining the feet of offenders, especially on board ships where they were used to confine mutineers, consisting of a long bar of iron with shackles sliding on it and a lock at one end to stop them from sliding off. From the use of bilboes evolved the term 'put in irons'. Bilboes are so named after the town in Spain, Bi...
irons.