Attributes . 100% Ceramic Alumina Micro-Fracturing Grain Constantly Exposes Sharper Grain Edges to Significantly Increase Cut Rate and Life Over Competitive Blended/Low-Ratio Ceramic Alumina Discs, Best Coarse Grit Fiber Disc Choice Combined with AVOS Patented Hole Design for Surface View Gives an Aggressive Cut and Reduces Heat by upto 30 Percent for a Longer Disc Life, Heavier Fiber Backing for Additional Strength and Tear Resistance, Self-Lubricating Grinding Aid Treatment Delivers the Coolest Cut on Stainless Steel, High Alloy Steels, Super Alloys, Titanium and other Difficult to Grind Materials, Speed-Lok Arbor Mount Provides Fast, Easy, Tool-Free Disc Changes . Names