You may not have given much though to the weight of your keys, but you should. We asked an expert if a heavy car key chain is ...

Many models even come with built-in key rings so you can easily add the SAK to the other tools and gadgets you'll want for your keychain — that way you'll never leave home without it.

Perfect for id card name badge and retractable keychain Upgraded Heavy Duty Badge ... Our max loading weight is 3.5oz or 7 keys compared to 2oz or 4 keys of other items on the market Stronger ...