A Fetters collar with a 12" chain and a Fetters single cuff connected to each side of the collar. Can be worn in front or behind the back for different effect. They use the standard Fetters lock consisting of a allen bolt in one side which screws into a matching nut on the other side. The key is basically an allen wrench. This is a later generation product so the hinges are not welded, and the finish is more rust resistant.