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 02145, Paper Sheet 346U, 80 D-weight, 3 in x 8 in, 7010359609
$0.36
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 62812, Adhesive Sealant 740 UV, White, 290 mL Cartridge, 7100116448, 12 per case
ACS Diamond Cloth Belt, CX1250 3/8" X 24" 75U
Standard Abrasives 700743, Cartridge RoII Mandrel, 1/8 in x 3/4 in x 1/8 in x 1 in x 2-3/4 in CM-4, 7010368728
3M 76631, Roloc Disc 777F, TR, 3 in x NH, 36 YF-weight, 7000028339
3M 41597, Polyurethane Adhesive Sealant 560, Black, 310 mL Cartridge, 7100005901, 12/Case
3M 22970, Disc Holder Adapter 9, 5/8-11 External 3/8-24 Internal, 7000046093
3M 07415, Hand Sanding Wood Finishing Pad 7415NA, 4.375 in x 11 in, Gray Fine, 7010383728
Standard Abrasives 712230, Cartridge Roll Mandrel, 1/8 in x 2 in x 1/4 in x 1-1/4 in x 4 in CM-11, 7000121797
3M 19811, Nitrile High Performance Plastic Adhesive 1099, Tan, 1 Quart Can, 7000000797, 12/case
3M 17227, Heavy Duty Duct Tape DT11, Silver, 48 mm x 54.8 m, 11 mil, 7100158346
Dynabrade 92044 2" Dia. x 1" W, 60 Grit, Z/A DynaCut Band, 10/pack
Standard Abrasives 32953, PSA A/O Disc, 711880, 2 in x NH, 60, 7010310798
3M 05744, Hookit Hand File Board, 2-3/4 in x 16 in, 7000045717
3M 05530, Stikit Soft Hand Pad, 2-3/4 in x 5-1/2 in x 3/8 in, 7000028351
Standard Abrasives 727087, Surface Conditioning Band, 1 in x 1 in MED, 7100096389
3M 05741, Hookit Hand Block, 2-3/4 in x 7-3/4 in, 7000045716
3M 05519, Sanding Block, Rubber, 2-3/4 in x 5 in, 7000000587
3M 01334, PSA Cloth Disc 348D, 50 X-weight, 3 in x NH, Die 300V, 7000118879 
