SUIT ALL YOUR NEEDS - This kit includes 50 pieces. of assorted shades: 80, 120, 240. This will make all your sanding jobs easier, covering the entire process (heavy roughing, intermediate finishing and final finishing). KWIK GRIP SYSTEM - Its support system hook support facilitates its installation, guaranteeing excellent fixation during use and easy disassembly. LONGER DURATION - Thanks to its manufacture in Premium Aluminum Oxide, you will have fast sanding and superior performance. Anti-clogging technology with a layer of molten zinc stearate that prevents premature clogging of the product, extending its useful life. Dry and semi-wet sanding. Easy to identify - The grits of the sanding discs are printed on the back for easy identification. "