I dropped a socket into a narrow space and needed a long, thin rod with magnets on the end to pick it up.  It can of course be extended with more extender beams.  I used CA glue to glue each part together.

Printed in roughly 3 hours on a Bambu Labs P1P with Overture White PLA

Layer Height: 0.20mm

Infill: 15% gyroid

Brim on, no supports, standing upright. Print with 3 walls for extra strength, though 2 is generally enough.  I used Arachne wall generation and outer/inner/infill print order, and 0.2 mm tolerances are built into the magnets and female slots on each rod, so you may need to glue/tape things together depending on your printer.