This is a set of 10 wire rings. They are compact and allow for neat storage of keys and charms. They open and close with a screw-type clasp. You don't have to worry about scratching your nails, and you can easily attach and detach keys and charms. They are easy to handle, even for children and those with less strength. In addition to using them as key rings to hold keys, you can also attach your favorite charms to create original key rings, or use the wire itself as a ring-shaped charm. How to use: The basic way to use them is to open the screw-type fastener at the end of the wire by turning it, pass the key or charm through, and then tighten the screw again. Total length: Approximately 15.5cm