This item features: -Excellent on carbon and stainless steel. -Premium 100% Zirconia offers maximum cutting capacity strong edge stability cool cutting with light pressure and long life. -Recommended for aggressive use and heavy duty applications. -Poly-cotton heat treated backing. -Special optimized resin bond offers maximum cutting capacity strong edge stability and long life. -Active grinding agent provides cool cutting with light pressure. -Abrasive Material: Zirconia Aluminum. -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:120 Speed:13300 rpm Applications:Deburring Deflashing Rust Removal Snagging Applicable Materials:All Materials Type:Type 27 ABDia.:4 1/2 in Tool Shape:Type 27 Arbor Diam:7/8 in Grit:36 Speed:13300 rpm Applications:Deburring Deflashing Rust Removal Snagging Applicable Materials:Ferrous & Non-Ferrous Metals High Tensile Alloy