ABN 4.5" x 7/8 T27 40 Grit Aluminum Oxide Flat Flap Disc Grinding Sanding Sandpaper Wheels 5 Pack 4.5 T27 40 Grit Aluminum Oxide Flat Flap Disc Grinding Sandpaper Wheel 5 Pk; Designed for use on rust, paint, steel, and non-ferrous metals, along with any other surface that needs sanding. High performance aluminum oxide with abrasive for extended disc life and an aggressive cut. Durable fiberglass back is lightweight while providing extra strength and absorption of tool vibration. For grinding, stock removal, edge chamfering/beveling, weld blending, deburring/deflashing, rust removal, blending, cleaning and finishing. Disc is semi-open to retard loading on aluminum. rust paint steel non-ferrous metals ...and many other surfaces that needs a good sanding! grinding stock removal edge chamfering/beveling weld blending deburring/deflashing rust removal blending, cleaning finishing