This item features: -Polyester heat treated backing and active grinding aid contains active grinding agents to lubricate the grain. This allows the Zirconia to break down with light pressure. -For stainless steel applications but also excels on carbon based metals. -Best flap disc on the market for stainless steel applications but also excels on carbon based metals. -Abrasive Material: Zirconia/Aluminum Mix. -Used With: Right Angle Grinder/Sander. -Quantity: 10 per carton. Model Code Model Description AADia.:4 1/2 in, Tool Shape:Type 27, Arbor Diam:7/8 in, Grit:36, Speed:13300 rpm, Applications:Deburring, Deflashing, Light Pressure, Rust Removal, Snagging, Applicable Materials:Ferrous & Non-Ferrous Metals, High Tensile Alloys, Non-Ferrous Metals, Plastics, Stainless Steel, Woods ABDia.:4 1/2 in, Tool Shape:Type 27, Arbor Diam:7/8 in, Grit:60, Speed:13300 rpm, Applications:Deburring, Deflashing, Light Pressure, Rust Removal, Snagging, Applicable Materials:Ferrous & Non-Ferro