GET MORE CUTTING POWER: The ABN 2-Inch Angle Grinder Flap Disc 120 Grit Grinding Wheel 10-Pack is a flap wheel kit that is a blend of zirconia and aluminum oxide grain that allows the die grinder sanding disc to self-sharpen for a more powerful, abrasive cut on carbon and mild steel applications REDUCE VIBRATIONS: One-sided zirconia flap disc constructed from resin fiber with a fiberglass backing plate to offer extra strength and absorb vibrations without smudges or smears during use; Grinding disc is semi-open to reduce loading on aluminum surfaces 120 GRIT TO DEBURR & GRIND: Angle grinder sanding wheel is designed for working on flat surfaces; These 120 grit flap disc wheels are ideal for deburring and grinding on flat work surfaces such as stainless steel, aluminum, and non-ferrous metal; Avoid forcefully pushing down on flap disk to prevent wear or damage