I have a lot of keys for tool boxes, locks and so on lying around at home. This allows me to recognize every key directly, even if it is thrown into a drawer. Won't stand up to constant abuse, but that's not what I bought it for.
Stainless Steel Husband Keychain with Stamped Relatives for Enhanced SEO
31 Review
Ultimate Titanium KeySmart: A Must-Have Organizer for Men's Accessories
49 Review
KeySmart Magnetic Keychain Secure Attachment Men's Accessories
63 Review
Titanium Keyring by BANG TI: Easy-to-Use Operation for Ultimate Convenience!
50 Review