Alumina Zirconia: A high-performance alloyed abrasive formed by Zirconia deposited in an Alumina matrix. An alloy of Aluminum Oxide and Zirconium Oxide. Designed for heavy duty stock removal for metal and wood, with self-sharpening characteristic. Belts are normally blue in color. It normally works well for grinding stainless steel, spring steel, titanium and other hard metals and for dimensioning wood. Comes in Belts, Discs, Fibre Discs, and wraps for your drum sander.
Aluminum Oxide: An abrasive made by fusing the mineral bauxite. A very strong and tough abrasive. The most commonly used abrasive for wood and metal. Normally brown or reddish-brown in color. Usually it is best suited for sanding metals, wood and solid surface. Comes in Belts, Sheets, Sleeves, Rolls, and even several options in the form of discs.
Zinc Stearate: A dry lubricant added to the surface of coated abrasives (usually sheet or disc goods) which prevents loading of soft materials such as paint and other finishes. Normally white-gray in color.
Silicon Carbide: An abrasive made from coke and silica sand. Very sharp and hard abrasive. Used for sanding between coats of finish, painted or otherwise finished surfaces, rubber, plastic, non-ferrous metals and other types of materials. Cuts very well under light pressure. Has self-sharpening properties and normally black in color.
Garnet: A very sharp grain that cuts very quickly when new. It fractures quickly, keeping it sharp. it is perfect for sanding wood end grains or for final finish sanding of wood. Garnet is very economical. Mostly found in sheet form.