IIRC They're Coin Controls mechs. The nibs are molded into the sides. They're hollowish, so if you remove them, there is a hole remaining. So yes, my statement is true. Both having holes on the sides AND having molded nibs. If the nib is missing you can take a metal nib and screw it right into the hole that remains.
So...overall, since there are molded nibs on these, *you* don't want them.