Keyring
Excellent quality and a brilliant solution to the traditional split ring key ring that breaks your nails every time you want to remove or add keys. It is very secure but at the same time you not have to exert excessive force to depress the spring element of it to get keys on and off. A bit pricey but you definitely get what you pay for. I would highly recommend it for those people who regularly reconfigure the keys they carry about with them depending on where they are going or what they are doing.