The 3M™ Cubitron™ II Roloc™ fiber disc 987C is designed for heavy duty metalworking applications such as weld grinding, beveling and flame cut edge cleanup. This product uses 3M™ precision shaped grain on a fiber backing for fast grinding and blending. Our 3M™ Cubitron™ II Roloc™ fiber disc 987C uses precision shaped grain technology (PSG) for heavy duty metalworking applications. 3M™ PSG is an exceptionally high performing ceramic, resin-bonded to a stiff fiber backing. Our 3M™ fiber 987C products incorporate a grinding aid to keep the workpiece cooler, protecting heat sensitive alloys from heat damage and reducing rework. These features offer increased productivity for heavy duty grinding on all metals, including stainless steel. To create PSG, engineers start with 3M™ ceramic abrasive grain and use proprietary technology to form the grains into triangular structures and electrostatically orient them on the backing to form sharp peaks that maximize cutting potential. These peaks slice cleanly through metal, rather than gouging or plowing as traditional abrasive grains do and continuously self-sharpens as the points break off. This generates a super fast cut and lessens heat build-up due to friction, reducing heat related stress cracks and discoloration. PSG also wears evenly and because the abrasive stays cooler and sharper, Cubitron™ II products last significantly longer than their conventional ceramic counterparts, ensuring extended high performance in production applications. Our Cubitron™ II products achieve a fast cut rate and a long product life. Cubitron™ II 7100050304, Close Coated Premium Quick-Change, 3 in Diameter Disc, 36+ Grit, Extra Coarse Grade, Ceramic Abrasive, Fiber Backing, Quick-Change Type TR Attachment, Applicable Materials: Cobalt, High Nickel Alloy, Stainless Steel, Titanium and Zirconium, 20000 RPM Maximum, Orange