It's a reproduction of a component of a torture device he saw in the Tower of London. This is applied before plucking out intestines as per the final scens in the movie "Brave Heart" which is, of course, the first act to drawing and quartering. These Brits, you know... Took 'em forever to stop hanging folks at Tyburn and suspending pirates between tides in gibbets. This is part of a device known as "Slow Death by Uke." Kind of like the Spanish "garrotte"...not to be confused with the French style that can be done with a ukulele string...