Aluminum oxide is a very hard mineral that maintains sharp points on the grains much longer than natural abrasives such as emery or garnet. The abrasive grains are adhered to the sandpaper with some space between them, known as open-coat construction, to minimize the buildup of dust on the surface of the paper, which would otherwise load the abrasive points. Loading often results from sanding soft materials and can clog the abrasive, shortening the usable life of the sandpaper sheet.
3M 02118, Paper Sheet 346U, 40 D-weight, 9 in x 11 in, 7000118259
$1.70
Factory Stock, 7-10 Day Leadtime
3M Paper Sheet 346U is constructed of aluminum oxide and comes in a range of grades and sizes to accommodate many different projects. The paper backing is durable for coarse sanding, yet flexible enough to be used on curved surfaces. Its cut-rate and durability make this an excellent choice for blending the joints of connecting pieces in wood- and metal-working.

3M 34672, 641WY, 1/2" X 64", 100 Mesh, Diamond Cloth Belts 7100111364
3M 77154 Scotch-Brite Durable Flex Belt, 1/2 in x 18 in, A FIN, Trial Pack, 7010310032
Norton 66261096557 - 3" X 1/2" Blaze Rapid Strip Ceramic Alumina Extra Coarse Grade Non- Woven Abrasive Disc With Quick Change TR III Attachment, 25 Each
3M 19079, E-A-R TaperFit 2 Probed Test Plugs 393-2006-50, 50 EA/Case, 7000002388
Dynabrade 51330 .7 hp Router, Front Exhaust, 20,000 RPM, 3/8"-24 Spindle
3M 97421, Aluminum Foil Tape 3380, Silver, 72 mm x 45 m, 3.25 mil, 7010375681
3M 19772, Utility Cloth Sheet 314D, 9 in x 11 in P80 J-weight, 7000000359
Dynabrade 79108 1/2" W x 12" L 60 Grit DynaCut Premium Ceramic Belts, 50/pack
3M 05216, Hookit Sanding Block D/F, 115MM x 225MM, 7000119909
3M 33439, Cubitron II File Belt, 33439, 60+, 10 mm x 330 mm (3/8 in x 13 in), 7100033194, 10 belts per carton, 5 cartons per case
Standard Abrasives 714179, Aluminum Oxide Handy Roll, P240 J-weight, 1-1/2 in x 50 yd, 7100050575
Standard Abrasives 712149, Aluminum Oxide Handy Roll, P100 J-weight, 1-1/2 in x 50 yd, 7010295370 
