Made with a 100% ceramic alumina grain, this quick change sanding disc cuts faster and lasts longer than blended or low-ratio ceramic alumina discs Norton 3/36/Norton SG Blaze Plus Speed-Lok TR/R980P//Norton Speed-Lok (Quick Change Disc Grinder Discs For Metal Norton R980P SG Blaze 3-Ply Speed-Lok Abrasive Disc, Polyester Quick Change Sanding Discs About this item TR discs have threaded central hubs that require two and a half turns and mount to Norton TR or 3M Roloc TR back up pads Ceramic aluminum oxide is a self sharpening grit that is harder, tougher, and lasts longer than aluminum oxide Supersize lubricant helps cut faster and cooler for an improved workpiece finish, and extends the life of the abrasive 3 ply laminate disc for an... Create a clean surface on 300 and 400 Series stainless steel and other tough metals with this coarse grit quick change disc on a right angle grinder Buy Norton R980P SG Blaze 3-Ply Speed-Lok Abrasive Disc, Polyester Backing, TR, Ceramic Aluminum Oxide, 3" Diameter, Grit 60 (Pack of 25) CA2 at International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.