Herm Sprenger is one of the most recognizable and popular names in obedience training tools. A safe and effective alternative to choker collars, it puts even pressure around the neck, about every half inch, pinching the skin in a band. This collar does not apply direct pressure to the trachea, so you can train your dog with little or no tugging, jerking, or pulling. The addition of a center plate connector can be replaced with a Cliclock quick release buckle and still allows the middle link to be configured symmetrically, enabling the prongs to tighten in the same direction. Made of high quality German stainless steel.