4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Disc 40 Grit - 10 Pack Benchmark Abrasives uses only the highest quality grains and backing material for our flap discs. Designed for grinding, blending, sanding and finishing on a wide range of material. The #1 choice for welders and metal fabricators. Made in accordance with ANSI safety requirements. For use on an Angle Grinder