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I read that a pyramid shape point is stronger than conical. Is that what you mean?

Good stuff Rick,

"Fantastic as it may seem, an ordinary nail
can be hardened by this process so that it can
be driven through cold steel plate, while
chisels can be made out of ordinary bolts...

You could use a smaller nail and to keep the drill bit from walking I used a center punch. You could also bend and / or harden the nail.

I was looking for a sewing needle and thought...well, I could maybe make one.

So many items are sewn together and needles aren't always available.

I took a 10d finish nail and flattened the...