Herm Sprenger - ULTRA-PLUS Training Collar with Center-Plate and ClicLock - Black Stainless SteelThis base model with one ring is safe and easy to apply due to the ClicLock and offers a quick and pinpoint influence on the dog. 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 Sprengers training collars