Tom Kitta
Ultra Member
I have this box with a hardness tester. It comes with one ball, two used bars with few spots left and a bit dirty tube to observe the results. The idea is to strike a ball on know hardness surface and observe indentation size. Then strike on unknown surface and observe size difference. Determine hardness from the difference observed. Not sure how much this is worth but I recon not much, let me know how much you think it is.
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