Cube shaped, faceted edges.
Made in Austria. 6mm x 6mm Hole size is approx. 20 ga. Takes up to heavy softflex. By the each.
The original bicone was article 5301, and was then replaced by the Xilion cut 5328 - with more facets and alternating narrow and wide facets. As stock sells out at our wholesale sources, they restock with the new shape, so most are 5328 style except some special old-stock coated colors. We always stock the newest version available.