Prong Back Up Link
Prong back ups are a safety clip meant to be clipped from a secondary collar (not the prong) to your leash. If the prong fails or becomes undone, it's a safety device so your dog is not free from the leash.
8" in total length/ 5/8" in width
Brass, Nickel or Onyx (black) hardware
colors from left to right in first image
Cedar - Slate Blue - Olive - Plum - Ice - Jett - Sienna
disclaimer - always consult a professional when using a new training tool like a prong collar.