If you find yourself constantly needing a bit driver you can build a keyring version by adding a magnetic bit driver designed to be used with a power drill to a carabiner key ring. Simply attach a nut large enough to fit the carabiner to the end of the magnetic bit driver with a little JB Weld .

Instructables user uglymike figured out the method to attach a magnetic bit holder to a carabiner keychain . Once that is done just add a set of keychain driver bits that are available at most hardware stores and you’ll always be ready to tighten or loosen a screw.

e8e01415a2medium.jpg DIY Keyring Bit Driver

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DIY Keyring Bit Driver [DIY]