Create a cleaner working environment when you use the ProSand multiair cyclone H831 coarse grit center hole vacuum disc to blend, sand or dry strip aluminum, fiberglass and composites, as well as hard and softwoods Longlasting, selfsharpening zirconia alumina grain works with the disc’s spiralhole vacuum design to remove material as you work, while the tear resistance of the sturdy and flexible Eweight hookandloop paper backing provides durability An antistatic coating and open coat make this disc ideal for applications in which you need an aggressive cut and loading is a potential problem Zirconia Aluminum Abrasive