I've had one on my keychain for a while. It's rugged enough for day to day use. The only issue is that the hole for the key ring has a thin wall, so I have a

I've had one on my keychain for a while. It's rugged enough for day to day use. The only issue is that the hole for the key ring has a thin wall, so I have a plastic coated keyring to prevent the metal from rubbing the hole.