The Pro Control Pinch Collar is the classic "prong" collar for training your dog. It helps you train your dog to stay by your side instead of bolting or chasing game by providing a quick correcting pinch when he pulls too far away from you. Helps teach all basic commands and obedience. The Pinch Collar helps train your dog quicker than training without it. It's size is adjustable thanks to the removable links and will fit most dogs.