NEW R980P Norton SG BLAZE PLUS disc's have improved base adhesion, for exceptional grain retention , resulting in 30%+ longer life versus original Norton SG BLAZE products. Improved Y-weight polyester backing. Advanced “supersize” grinding lubricant extends abrasive life and helps products cut faster and cooler for improved part finish and integrity. Lasts 50% to 200% longer on hard-to-grind materials and alloys: mild and carbon steel, stainless, cobalt, chrome, inconel and titanium.