Genuine Herm Sprenger, properly fitted, or nothing. The fur saver is a stainless long-link chain that will not pull coat. The Ultra-Plus prong has a stamped center plate, blunt prongs, and removable links for sizing. It sits high on the neck, behind the ears and under the jaw. Check the stamped plate and buy from a reliable seller. Counterfeits can hurt your dog. I use the third-party snap buckle because the Herm Sprenger quick-release is hard for me to operate.
The Herm Sprenger fur saver
The Herm Sprenger prong collar
The quick-release buckle