The lasting tacks and the basketry tacks (your links) have heads that are roughly four times the diameter of the nails that I am using. The heads are also not perfectly round. Neither the 3 ounce lasting tacks and especially not the 1/2 ounce basketry tacks (which are roughly 1/4" long) are long enough to secure a rubber or leather toplift. Furthermore the "shaft" of both the lasting tack and the basketry tack are cut metal, squarish/flat, and probably not more than 1.5 millimeters at the thickest point.
I may be off my rocker but ignorance is worse.
the way that the nails are driven with the head flush into the rubber really makes me doubt that they will ever be hit with a glancing blow (especially arising from some sort of heel strike that would create an equivalent force), so I think that your concern is quite unfounded.
mr. kennkim . . . . i realize you're having a discussion with DFW about installing nails as heel or toe
protection. frankly I lilke the idea and hope to work with a cobbler to accomplish the same thing
without cutting into the sole for a toeplate.
i'm sticking my 2 in here maybe unwanted, but want to ask you to look at the pic below
he, whose balls you're trying to bust made this beauty. understand what that means ?
unless you, yourself can create something like that . . . . stfu & listen