PopSci 5-Minute Project video: nut-and-bolt keychain
Downsize your pocket cargo with a custom-fit keychain.
Downsize your pocket cargo with a custom-fit keychain. Editor Sean Captain ditches the ring and uses more tool than necessary to trim a small bolt to just the right size for his set of keys. (For a slightly different take on the project, see the site that inspired us: carlitoscontraptions.blogspot.com).