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 40321 Dynafile II Abrasive Belt Tool Versatility Kit
Dynabrade 50273 Locking Flange Nut, 5/8"-11 Thread
Dynabrade 53077 1/4" Straight-Line Drill, .4 HP, Rear Exhaust, 950 RPM
Dynabrade 78143 6" Dia. x 1/2" Center Hole, Extra Coarse, DynaStrip Disc
Dynabrade 95020 Screw
Dynabrade 92102 3" W x 10-11/16" L 80 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 78709 3/8" x 3/4"-B52 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 13501 Dynastraight Finishing Tool, 1 HP, Rear Exhaust, 1,800 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade Nitro Series NZ1 NitroZip, Eraser Tool 
