A revolutionary, patented cup bur design. The Tungsten Champion Cup has no inner blades, instead it features two slotted openings opposing each other. Outstanding, smooth surface prong eliminates additional polishing procedure. No clogging on softer metals and particularly good for platinum. Guaranteed to outlast conventional cup burs over two times. The FCC Champion Cup is the ultimate cup bur for reaching tight places and rounding prongs that are very close together, because it has an extra thin wall a setters favorite.