10-19-2020, 11:20am
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#10
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Sparkles Flambeaux
Barn Stall Owner #4
Barn Raising I,II
NCM Supporter '13,'14,'15,'16,'17,'21
Bantayan Kids '13,'14,'15,'17
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known as PK nails, used by surveyors, as they have a little dimple in the center, so you can line up a staff or a plumb bob exactly.
https://en.wiktionary.org/wiki/PK_nail
became very familiar with these years ago in Antarctica when I helped out the surveyors a bit.
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