These cuffs are new on the scene. They were designed by L. John Goncz, a respected firearms designer. These cuffs mostly follow the "standard" design. The biggest obvious difference is that they don't have swivels on the connecting chain. There is a three-link chain which is directly connected to a cuff body at each end. The action is smooth. The ones pictured are the "High Security" version which are made of case hardened steel and are chrome plated.