From the makers of Moore's Discs, these are pin hole discs (no metal) centers with Adalox (aluminum oxide) abrasive on paper backing. Use on our screw mandrels.
Boxes of 100 are available in 4 diameters (1/2", 5/8", 3/4" and 7/8") and in Coarse, Medium and Fine grits for a limited time. Then these pin hole discs will be available in boxes of 300 discs and in 3 diameters (5/8", 3/4" and 7/8") and in 3 grits (Coarse, Medium and Fine).