This completely unique tag ring is designed to make it easy to add or remove your pet's tags as well as switch tags from collar to collar. Made of two durable nickel rings attached by a swivel so that the tags won't get tangled. The top ring easily attaches to or releases from any collar. The bottom, larger ring is the tag ring, with an easy attach/release for your pet's tags. Great for cats and dogs. Available in one size and one color.