The HS Snap-On Ultra dog training collar is German made from the highest quality raw materials and outstanding craftsmanship. This dog training collar is made of linked prongs that distribute the correction pressure evenly around your dog's neck. The Herm Sprenger training dog collar features a unique scissor snap that can be used to quickly release your pet from the correction. It is so simple it can be done with one hand. This Herm Sprenger dog training collar will not tarnish, rust or break. It is 18" long and can be made longer or shorter by adding or removing links. Additional links can be purchased.