I’ve had a cable stop that was riveted to my chain stay drilled out and it’s left a small bit of metal rivet inside the stay that’s now rattling about.
I’ve tried shaking and turning the frame to get it to fall out of the seat tube, but no luck so far.
Compressor such as a local garage car tyre inflator - ideally with 'free air' and staff that know you.
Compressed air > partial vacuum (5 bar rather than 0.5 bar) but watch out for flying debris such as rust, brazing flux, etc. as well as the bit that rattles.
I had this in a carbon frame.
Tried the Vacuum cleaner and the magnet.
Ended up sorting it by pouring in some very thin superglue and letting it set with the rattly thing in it.
Make a hole for the glue, if needs be.
I’ve had a cable stop that was riveted to my chain stay drilled out and it’s left a small bit of metal rivet inside the stay that’s now rattling about.
I’ve tried shaking and turning the frame to get it to fall out of the seat tube, but no luck so far.
Any other clever tricks I can try?