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This is a plastic replacement shell for a multimeter probe. I used an nail (check if resistance is not too big) that I solder a cable to and then insert inside a probe and welded it together using 3d pen. I needed to widen those grooves inside a little bit to fit everything. You can also use this metal piece from old broken probe or just improvise. Remember to remove a battery from multimeter or detach cable before soldering juuust in case.

You can glue two halves together or weld it using dremel or 3d pen.

Added version 2, may requre scaling.

WOHOAAA

Really that much interest in something so simple and basic? I was thinking noone will actually even need it that much.