The desired length of the strip can be torn from the roll for a specific application. Most grades have a light, J-weight cloth backing that provides the flexibility needed to conform to circular edges, angles, or other contours. Rolls in grades P50 or P60 have a slightly stiffer X-weight backing suitable for more coarse sanding applications. Cloth remains durable even when bent or rolled, without tearing or shelling, but strips can be torn by hand when a smaller piece is needed, without compromising the sanding surface.
Aluminum oxide is a popular choice among industrial professionals because of its fast cut-rate and long life. This mineral makes a tough, durable abrasive that self-fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Aluminum oxide is suitable for a wide variety of materials in both woodworking and metalworking, including ferrous alloys. Aluminum oxide abrasive can be used on ferrous and non-ferrous metals, wood, and plastic.

Dynabrade 79828 DynaSpark ZA 5" x .045" x 7/8" T42 Right Angle, Box of 10 Discs
Dynabrade 93344 Carbide Burr, 1/8" Dia., SF-42 D/C Burr, Tree, 1/2" Flute L, 1/8" Shank
Dynabrade 53091 3/8" Pistol Grip Drill, .7 HP, Rear Exhaust, 950 RPM
Dynabrade 53502 - .5 hp Straight-Line 7-1/4" Extension Die Grinder, Rear Exhaust, 20,000 RPM, 1/4" Collet
Dynabrade 91743 DynaMesh 8" 280 Grit Hook & Loop Discs, 50 per box
Dynabrade 18716 Cylinder
Dynabrade 49420 .4 hp Angle-Head Die Grinder, Rear Exhaust, 3,200 RPM, 1/4" Collet 
