This Herm Sprenger revolutionary ClicLock buckle is made of stainless steel. This buckle makes the collar easy to put on and take off thanks to the simple opening and closing mechanism. It even provides an audible click to ensure proper closure. Herm Sprenger’s revolutionary buckle design substitutes the typical metal center plate with the ClicLock, allowing you to fit the collar around your dog’s neck and fasten, rather than pull the collar over their head. This ensures the fit is not loose and provides adequate correction without risk of falling off. Durable Stainless Steel Material Universal Prong Collar Compatibility Easy to Install and Remove Collar Improves Prong Collar Fit and Performance Safe and Secure The ClicLock buckle is used to improve the performance of your Herm Sprenger dog training prong collar The high-strength quick release buckle, made of quality stainless steel material makes your existing prong collar much easier to put it on and take off while improving the fit and performance as well. These buckles will look wonderful with Herm Sprenger prong collars. They make the already great Herm Sprenger prong collar even faster and simpler to use while preserving complete collar capability without the need for extra hardware.