Each one-of-a-kind Pen Holder is hand blown by a consigned glass artist at Arizona State University Studios.  Due to the creative glass process, each has marbled and swirled features unlike any other.  Why "Big Bore"? It was designed to accommodate the WAHL-EVERSHARP Modern Decoband pens the barrels of which are about 50mm and far too big for standard pen holders.  Consequently, these pen holders will handle almost any penregardless of size.