The Herm Sprenger Prong Training Collar is the perfect solution for dog owners who want to safely and effectively train their pup. Crafted from durable, high-quality materials, this collar is designed to be gentle on your pup while also providing superior control. To ensure a perfect fit, be sure to measure your pup's neck before ordering. With the Herm Sprenger Prong Training Collar, you can keep your pup under control while also providing positive reinforcement and teaching them obedience.