Norton BlazeX F980 AVOS CA Fiber Discs 100% ceramic alumina micro-fracturing grain constantly exposes sharper grain edges to significantly increase rate and life over competitive blended/low-ratio ceramic alumina discs. Self-lubricating grinding aid treatment delivers the coolest on stainless steel, high alloy steels, super alloys, titanium, and other difficult to grind materials. Heavier fiber backing for additional strength and tear resistance. Best coarse grit fiber disc choice combined with AVOS patented hole design for surface view gives an aggressive , and reduces heat by up to 30 percent for a longer disc life; Speed-Lok arbor mount provides fast, easy, tool-free disc changes. Pack of 10