I ordered a MiniTools test clip to start experimenting with flashing EEPROMs. There was no information on the retailer's website regarding the width of the pins. This is what I got:

I asked MiniTools if they have any solution to this. They said "no". I then realized that this clip was probably meant for soldering. Which I haven't had the energy to learn yet.
I ended up buying the expensive Pomodo one.
The flashing went well.
If that is the SO-14 clip, it is 1.27mm or 1/20in. There are small PCBs to convert SO-14 to 2.54mm / 1/10in raster. Simple soldering job, but if you don't have the means, look for a repair cafe.
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