Keep your Halo collar prongs secure and avoid the hassle of lost contact tips with the Prong Saver. Designed as a cost-effective solution for pet owners, the Prong Saver prevents the metal prongs on your Halo 3 & 4 collars from unthreading during daily use. Halo collars come with interchangeable metal prongs that can loosen over time, increasing the chance of losing them. Unlike other solutions requiring adhesives like Loctite, the Prong Saver is easy to install and allows you to remove and swap prong sizes as needed.