Well...there are many keys with holes in the end, to accept pins within the lock. You all will know what the nomenclature appropriate for such features are.

So the key I have may have been available in a 'blank' configuration, with hole; the need for such a hole, if absent, would leave opportunity for plugging the hole. I'm guessing, obviously...

Regarding Lock and Key Anatomy: is there a site (or a page in this forum) where such fundamental information can be found? It is somewhat embarrassing to stumble over descriptive specifics in near complete ignorance.

wlw