The dental industry?s ?original? and ?longest lasting? mounted rubberized abrasives, MIDGETS in HP, RA and FG shanks, are packed 12 points of one shape per box. The following color-coded variety is available for your convenience. Brown (aluminum oxide) - ?Long-lasting? for pre-finishing all metals. Black (silicon carbide) - ?X-Coarse? for carving amalgam and gold. Green (silicon carbide) - The ?traditional industry favourite? for fast polishing of amalgam and gold. Leaves a satin finish. Blue (silicon carbide) - For final ?hi-shine? polishing of amalgam, precious, semiprecious and non-precious metals. Imps (Red) (aluminum oxide) - ?Coarse? - the ?improved Method of Prophylaxis? due to the elimination of the need for pumice. Rapidly removes tartar and stubborn tobacco stains without danger to enamel. Ideal for patients with highly sensitive teeth. White (aluminum oxide) - ?Ultra-fine? for ?Highest? polish on composites, enamel and gold. Grey (silicon carbide) - For instant ?hi-glaze? touch-up polishing of porcelain. HP (3/32" shank)