A modern version of the Hiatt Darby Antique Adjustable Handcuffs made by Hiatt for centuries. These are made from a "pot" metal which is weaker than the steel used in days past. The keys are made of the same metal alloy and are known to strip if not handled carefully.
A rather comfortable adjustable handcuff. The locking mechanism is based on a spring backed bolt which is threaded on its outside. The key is threaded on the inside and is screwed on to the bolt until it retracts. Being Darbies, these are NOT swing-through cuffs.