Basic well-made rigid swing through handcuffs. The opening is adjustable and designed to wrap snuggly around the wrist. They are made of Aluminum and utilize a simple and reliable lock mechanism - one key hole allows access to both locks. Applied with the keyhole facing AWAY from the hands, it is extermely unlikely that they could be opened by the wearer even if (s)he were to have access to the key. Each is individually made by the German machinist Martin and, yes, they are available for purchase. Prices and conditions are available by email.