Dog pinch collar is an effective dog training tool to train your stubborn friend without producing any pain or injury. A pinch collar, also called a prong collar, is composed of small metal rings linked together and each has a set of prongs that tighten and pinch your dog’s neck( no pain) when it is being pulled by dog. Similar to a chain bracelet, it can be adjusted by removing or adding the links. It simply pinches the skin on the neck, simulating the effect of another canine nipping at the neck.