ThunderRing Easy Tag Connectors (4 Rings) Easy on - easy off. No more split rings and broken nails. Not just great for dog tags. Try ThunderRing for your club I.D., keys and more. With industrial-strength, ThunderRing holds up to 25 lbs. Package contains three rings for dog tags, with a bonus large ring that's great for keys, your backpack and other convenient uses. Works great with ThunderCover. Available In Red, Blue, Pink, Grey, Orange and Black.