Features:Made from high quality brown corundum material,which is not only durable but also stable. Efficient and Hard-wearing, low grinding noise.long service life. Applicable to general metal, carbon steel, alloy steel, stainless steel, cast iron, nonferrous metals and other weld grinding. Can increase the strength and absorb vibration, will not get dirty or dirty during use; semi-open grinding disc to reduce load on aluminum surfaces. Used for dedusting, deburring, getting stuck, flash removal and easy to polish and derust. Ideal for The Home, Workshop, Hobbyists, Tradesmen, Builders and DIY Enthusiasts, etc. 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 surfacesSanding discs are constructed of industrial grade high density premium zirconia and aluminum oxide grain,increased durability than standard flap discs, built for a more robust and economical grinding wheelGreat for grinding, blending, sanding and finishing on a wide range of material,such as rust, paint, ferrous, stainless steel, and non-ferrous metals, wood and plastics. It's ideal for metal grinding,hardware polishing and automotive,tensile grinding capacity. Specifications:Size: 51mm ( 2 ")Color: BlueMaterial: Zirconium oxideThickness: 8mmGrit: 120#,80#,60# ,40#Packet Included:5/10Pcs Zirconium Oxide Flap Discor5/10Pcs Zirconium Oxide Flap Disc+ 1Pc Padnote:Please allow 1-2cm errors due to manual measurement. Because of the different display of each computer, the pictures may not reflect the actual color of the item.