Material: Made of high quality stainless steel and chrome plated, durable and rustproof. Heavy duty chain link, strong enough to withstand large and aggressive dogs. GENTLE AND EFFECTIVE TRAINING: Training collars are the safest and gentlest alternative to standard choke collars to teach your puppy not to pull or wander while walking. Recommended Notes: Professional trainers recommend using a martingale training collar over a standard choke collar because it has a controlled force that reduces stress on the dog's neck. Fashionable: Made of rustproof chrome plated steel and shiny silver, your dog will look very cool and distinctive, high quality materials and high-level workmanship ensure that this collar will not tarnish or break. Usages: Perfect tool for training pets. Corrects bad behavior of the dog, corrects leash pulling and helps teach responsive walking habits, recommended for professional obedience training or dog walking, perfect for aggressive breeds like Pit Bull, German