Premium Quality - Crafted with industrial aluminum oxide abrasives, the sanding bits for offers sufficient hardness and wear-resistance for efficient grinding, thereby extending its lifespan.Great Sanding Effect - Great for grinding/polishing welded parts, rough edges, rust, metal surfaces with low noise and less dust. They can work in either drills or rotary tools.Multiple Sizes & Quantities - Designed in a /cylindrical 3 different shapes, sanding bit for drill are Perfect for sanding narrow or irregular spaces. 10/15mm cylinder shape, 10mm shape(30Pcs each size)Easy to Use - 1/8Inch are designed to fit either drills or rotary tools perfectly. The metal grinding bits for allow for quick change outs, ensuring a seamless workflow.Wide Application - Sharpen lawnmower blades, screwdriver tips, knives, scissors, and more. Perfect for polishing and grinding welding joints from metal castings and removing rust. The Sanding Drum can also adapt to any kind of drill.Quantity:90PcsMaterial:aluminum oxideSize:cylinder shape:3x15mm,3x10mm, shape:10mmPackage Contents:90 * sanding bits