The Big O® Key Ring is a one-size-fits-all bracelet key ring that can be worn on your forearm or above your elbow for hands-free simplicity. The patented, signature locking clasp clicks open and closed so you can keep your keys, phone and wallet in one central, secure location. Signature Locking Clasp - Swap your keys in and out securely, and without breaking a nail. Reinforced Shape - Non-bending, anti-squish design can withstand everything you can. Shatterproof - It passed our drop and durability test with flying colors. Water-Resistant Resin - Easy to clean with soap and water. One-Size-Fits-All Design - Oversized so you can wear it comfortably on your forearm or above your elbow. How to use: To open the signature locking clasp, press down on the flat part of the clasp with your thumb. Once it’s open, you can add on your keys, a wallet and more. To secure your things, pull the lever up until it snaps into place.