This outstanding range of handcuffs and leg irons comes from the China Xinshidai Company.  What an extensive range, and nothing short of excellent quality.  The Harrington and Richardson inspired handcuffs in two sizes are a very special, very high quality product.  I am at a loss to imagine how the original design was, according to the 'experts', supposed to be better quality, especially as they are also double locking.  All the modern Police handcuffs have back loading which is normally only found on Hiatts and Cyclone handcuffs.

On the other end of the spectrum is the range of very austere leg irons which, despite their rather severe appearance are extremely high security with difficult to pick tumbler type locks.