Modern Darby 'suit'

 

This is a modern 5 point Darby restraint setup made by KUB. KUB is a Pakistani maker which makes very high quality reproductions of historical restraints, primarily a wide range of Darby handcuffs, shackles and collars. It sold for $125 with 1 bid. 

This is a Darby collar with non adjustable Darby handcuffs and Darby leg irons. It looks like this is all permanently attached together. I don't think I see any swivels. The chain is standard twist link. 

The handcuffs are Sheffield style. This is a sort of "reverse" Darby key design where the keyway is an internally threaded hole, and the key is basically a bolt with a handle. 

These are stainless steel handcuffs and shackles but the Darby collar is stainless with a nickel plated steel lock tube. I believe a version in all stainless was available at one time. This is preferable as many people have a bad reaction to nickel plating when its pressed against the skin for prolonged periods of time. I have seen this first hand and experienced it to a degree myself after wearing a collar with nickel plating overnight. 

Five points restraint like this is really superfluous for any practical purpose. If someone were in transport restraints, adding a collar isn't really going to make them any more helpless. It's more for the prisoners sake, then, to ensure they REALLY get the point, that they surrender entirely. 

There aren't a whole lot of 5 point restraints, in part because the various separate pieces can be used individually and can also be assembled on one prisoner as a five point when needed. 

Here is a modern stainless steel 5 point restraint setup from China. All these items are available individually, but in this case they are permanently attached. They are all keyed alike. 

Here is an incredible vintage 5 point restraint from a private collection. They are permanently attached and there are swivels above and below the handcuffs. The leg irons as well as the connection chain have large, heavy oval flat links. The collar and leg irons are Bean Prison, and the handcuffs are Towers Bean Pattern. I wonder why they didn't use all Bean Prison cuffs. Maybe so that two keys would be needed to escape? This way, even if the prisoner found one key, they would still either be handcuffed, or shackled/collared.