Will the magnetic bits work with my impact driver?

These bits are designed for hand-driver use. Impact tools generate shock load that can crack bit tips—stick with the included handles or a manual screwdriver for this set.

Do the bits stay attached during overhead work?

Yes. The magnetic hold is strong enough to keep bits seated while you're working upside down under the engine bay or dash. They won't fall out on their own, but impacts or rough handling can knock them loose.

What happens if I lose a bit or the magnet weakens?

Replacement bits and handles are sold separately through standard tool retailers. Magnet strength typically lasts the life of the set with normal use.