Review on Lucky Line 0.5-inch Split Key Ring in Bulk - Nickel-Plated Tempered Steel, Heavy-Duty Metal Key Chain Ring for Cars, Crafts, Lanyards - Box of 100 Units (76000) by Ryan Carter

I bought these to attach various tags that my dogs wear on their collars. Rabies tags usually come with a brittle aluminum ring that will inevitably catch on something and cause the tag to fall off. However, it is rolled up very tightly and stays in place. I also use the ring to attach the key fob to the KeySmart Nano Clip. It's also a nice little alternative to large keychains.