A choke collar, also known as a choke chain, is a type of dog collar designed to tighten around a dog's neck when pulled. It is typically made of metal links and is used primarily for training purposes. The collar is meant to provide a quick correction to the dog when it misbehaves or pulls on the leash. However, it should be used with caution to avoid causing harm or discomfort to the animal. While choke collars can be effective for some dogs, they are often criticized by animal welfare advocates. Many experts recommend alternative training methods, such as using flat collars or martingale collars, which are gentler and do not pose a risk of injury. Proper training techniques and positive reinforcement are generally encouraged for better long-term results.