How did Frederick J Loudin make the key chain?

Frederick J. Loudin invented the key chain by designing a simple, circular metal loop that could hold multiple keys together while allowing easy access. His innovation involved creating a sturdy yet lightweight design that could be easily attached to belts or bags. This practical solution quickly gained popularity for its convenience, leading to widespread adoption. Loudin's key chain became a staple accessory, simplifying the way people organized and carried their keys.