3M™ Cubitron™ II Roloc™ Durable Edge Discs 947A 3M™ Precision-Shaped Grain delivers sharp, cool, consistent cutting action. Heavy X-weight backing does not wear and tear easily, rendering the disc a good match for edgework. Evenly-spaced grain features gaps that help debris escape, bolstering abrasive's ability to resist loading. Poly-cotton backing offers great tensile strength, helping enhance overall abrasive durability. Roloc™ TR and TSM attachments make disc to tool attachment swift and easy Pack of 200