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 02116, Paper Sheet 346U, 60 D-weight, 9 in x 11 in, 7000120221
$1.11
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 01326, PSA Cloth Disc 348D, P240 X-weight, 3 in x NH, Die 300V, 7000045069
3M 86992, Diamond Disc, 3" Roloc, 674W, 120 Mesh, TR, 7100143477, Box of 5
3M 22392, Roloc Disc 361F, 24 YF-weight, TR, 3 in, Die R300V, 7000045090
ACS Diamond Grinding Disc, 4-1/2" Dia. X 5/8"-11 Center Hub Thread, Type 29, 36 Grit
Dynabrade 78467 2" Dia. x 3/4", 8-32 Female Center Thread, A/O, 120 Grit, 8-Ply J-DynaCut Cross Pad, 100/pack
3M 30702, Cloth Belt 577F, 50 YF-weight, 2 in x 132 in, Film-lok, Single-flex, 7010363104, 50 per case
3M 27008, 642WY, 3" X 30", 50000 Mesh, Diamond Cloth Belts, 7010533172
3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
3M 45718, Cubitron II Hookit Cloth Disc 947A, 120+ X-weight, 5 in x NH, D/F 5HL, Die 500FH, 7100113075
3M 45700, Cubitron II Hookit Cloth Disc 947A, 60+ X-weight, 3 in x NH, Die 300V, 7100113109
Standard Abrasives 717078, Cartridge Roll Mandrel, 3/32 in x 3/4 in x 1/4 in x 1 in x 2-3/4 in CM-2E, 7000121813
Dynabrade 95848 Dynabrade Gear Oil
ACS Diamond Cloth Belt, CX1250 1/2" X 18" 250U
3M 05442, Stikit Soft Hand Block, 2-3/4 x 5 in, 7000045435
3M 05440, Stikit Hand Block, Hard 2-3/4 in x 5 in, 7000045764
3M 14343, Marine Adhesive Sealant 4000 UV, Black, 600 mL Sausage Pack, 7010309931, 12/Case
Standard Abrasives 32953, PSA A/O Disc, 711880, 2 in x NH, 60, 7010310798 
