Two other possibilites...
These tiny dental cleaning brushes are cone shaped and about 1/4" long by 1/8" at the widest point. The flexible handles are about 2" long...
These bottle brushes cover a range of sizes with the smallest being only about 1/8" OD...
Some great ideas there.
On the issue of old eyes seeing small things, one of the best bits of dumpster diving I've ever done was to take a video projector apart to remove the lens cells in the projector. I ended up with a magnifier that has the optical quality of a high end device (loupe or hand held magnifier) and it cost me nothing but time. No pictures at the moment but your link reminded with the magnified punch.
Unfortunately I'm finding more and more needs for optical aids.
and, for really small stuff or stuff that's typical to approach with a larger magnifier, this conventional loupe design, which also has built-in lighting, fits the bill perfectly. Worn on a neck chain, it's always to hand...
Of course, I also have bigger magnifiers (e.g. visor, lamp with lens) but the two above get the most use.
Well, many times it includes repurposing. I needed a very small wire brush that was at the end of a handle. Could not find anything. Then while doing something else the idea popped into my head. So I pulled out a bunch of wire out of those cheap wire brushes. Then I stuck it into the end of those acid brushes and crimped it down hard to hold the wires in. I thought I would have to solder them in but so far so good. And has served its purpose well.
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