This Herm Sprenger prong collar is a high-quality dog training tool made from durable black stainless steel. It features adjustable links to ensure a comfortable fit for medium-sized dogs of all breeds and genders. The collar is designed to provide effective control during training sessions, allowing you to teach your dog essential obedience commands and improve their behavior. With a swivel attachment, this collar is easy to put on and take off, and its country of origin is Germany. The collar has no modifications and comes from a trusted brand that is well-known for producing effective dog training tools.