Hello, arm candy! A rainbow of signature colors and metallics, Croc Big O® Key Rings are a revolutionary mashup of fashion and function. The Original 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 ease. The patented, signature locking clasp clicks open and closed so you can contain your house keys, car keys, card case, and more in one central, secure location.