Chinese Stainless Steel

 Chinese Stainless Steel restraints have developed into a wide array of high quality options. There are many designs, multiple sizes, and several different locking mechanisms. These are available on eBay. 

Above, an extremely heavy pair of stainless steel leg irons. Chinese makers often use an oversized chain, so that the weight of the chain is an impediment to movement, but in this case they went for extreme weight with these thick heavy cuffs. 

These lock with a key, but they are also available with a hex key, as seen below. 

Above, note the tight fitting closure, and the high quality finish. These have well rounded edges, although this is really excessive as far as weight. 

Below, this is a more moderate pair of leg irons. These use the tubular push key; the center pin pops out when unlocked, and you can lock it by pressing the pin in once the cuff is closed. These are a very nicely finished restraint with a smooth, polished finish and tight hinges. They used quick links for the chain which does allow the use of different chains or configurations, but also means these are lower security as all it takes to remove the chain is a crescent wrench or pliers. 

Above, this is a full 5 point restraint set with core locks. These locks have a tab that rotates 90 degrees inside the keyway to secure the cuff. These are not very secure; I have a set of the handcuffs and can unlock one of them with any small metal object, including the tip of the key without even fully inserting it. The core locks are replaceable, but I have yet to find a correct sized one readily available. These here have the quick links but the sets I have are solidly chained. All restraints here are available in two sizes. 

TO BE CONTINUED 

Above, extra wide stainless steel cuffs. These just illustrate the wide variety of designs being made by these Chinese makers. 

Below, a rather hefty collar with a vertically oriented 4 way lock. The only thing wrong with this collar is that the large, rigid O rings have exposed fastener heads on the interior surface. 

Below, an example of the continuing variety available for these restraints. This is a press lock Handcuff with a rigid spreader bar. These are also available for the ankles. These are round shaped cuffs with very smooth surfaces. 

Below, this is what I would call the lowest quality of Chinese restraints currently. They are still mirror polished and well made but they are somewhat flimsy and require small padlocks to secure and connect. 

Below, another example of the extreme weight available, as well as the variety. These are simple,  heavy shackles with a round cross section. They secure at the tang where the O ring for the chain connects with a short hex key. Traditional examples of this design used in China used rivets hammered into place. The integrated weights seen on this example are just unreasonable, but this is actually NOT the heaviest example of this design, believe it or not. 

The round cross section design, which is very ergonomic, is also available as leg irons with a standard chain, and as a collar (in two thicknesses, the small diameter one is just barely solid enough), and also as handcuffs, both in two sizes.

TO BE CONTINUED 

Here is a modern made heavy transport restraint from China. This restraint combines the heavy leg irons with a straight link connecting chain and a pair of H & R Super style Handcuffs. These particular leg irons use a hex key, but they are also available with a standard Yale type tumbler key, a 4 way key, or some type of  crescent key.