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.