3M Scotch-Brite 7447 Pro Sanding Roll 64958 - 3.66 in x 9 in - Aluminum Oxide - Very Fine3M Scotch Brite 7447 Pro Sanding Roll 64958 3. 66 in x 9 in Aluminum Oxide Very Fine 048011 64958 3M Scotch Brite non woven 7447 Pro sanding roll uses aluminum oxide as the abrasive material. Since this product is non woven, grade is generally used to describe the abrasiveness; with the 64958 having a very fine grade. The sanding roll has a width of 3. 66 in3. 667 in and length of 9 in. Product Specifications Brand: 3M Trade Name: Scotch Brite