The bells is made of high-quality metal, the surface is chrome-plated smooth and corrosion-resistant, strong and not easy to break.The cat bells sound is crisp,they attracts pets' attention and makes them happy. bells can be clamped on any small ring at will, and can be clamped on some thicker ring when used with a key chain. Widely ApplicableFits for cats, dogs, or other pets with collars etc, can help prevent pets from escaping your sight when they are outdoors, you can always know where they are. Free Collocation bells of different colors can to freely matched, you can choose one or two bells to clamp on the pet collar ,or more.You can according to your preferences to match.