The heavier and wider edition of the popular Buzz-On "Element X". This was a one-time release that contained, at the time, patent pending SPR brass spacers.
The base Element X model was a completely new design from David Bazan at Buzz-On. Similar in shape to the Duncan FreeHand, it has the name "Element X" engraved on the outer aluminum weight rings.
See the picture "Packaging, back" to read more about the elusive "X Pro" edition.