About This Top Quality:Flap discs are made of high grade Zirconia Alumina which is harder than normal material. Our flap wheels will make your work easier and more efficient Professional Craftsmanship:Grinding wheel is made of high temperature calcined corundum, which greatly enhances wear resistance and extends the life of the product High Efficiency:T29 flap wheels are build from high temperature resistant substrates and the usage of sanding surfaces is greatly increased, resulting in increased sanding efficiency and cost savings Great Longevity:Flap disc for angle grinder is designed with extra thickening. We uses a large abrasive surface to increase the sharpness and longevity Wide Applications:4-1/2 inch flap disc is suitable for most angle grinders and can be used on stainless steel, metal and wood. Widely used for grinding welds, deburring, rust removal, casting cleaning, wood grinding and polishing Overview Grit Material : Zirconia Product Dimensions : 4.5"L x 4.5"W Brand : S SATC Compatible Devices : Angle Grinder Grit Type : Coarse