The comfort version with ring and swivel offers highest flexibility between dog collar and leash due to the swivel. Equipped with center-plate and assembly chain, it is a classical option for dog training. The ClicLock fastener allows the collar to be opened and closed comfortably. * more flexibility between the dog collar and the leash due to the swivel * safe and easy to apply due to the ClicLock * pull limitation on the length of the assembly chain Herm Sprenger is one of the leading manufacturers of dog training products, best-known for their quality, reliability, and safety. All products are made in Germany, utilizing only the finest materials and components. Through their continuous quality control efforts over the past 140 years, Herm Sprenger’s training collars are recognized as one of the best training collars sold on the market today. Sizes Available: * Gauge 2.25mm x 16" (41cm) * Gauge 3.2mm x 23" (58cm) * Gauge 4mm x 25" (63cm)