The 11Hole 180G Multi Sander Sheets is a set of high quality sanding sheets ideal for fast and fine sanding of large surfaces and small corners Best suited for wood, this can also be easily used on other surfaces like metal and more Compatible with multi sanding machines from almost all major brands, this set comes with set of 10 sanding papers of 180 Grit The set is handy and effective in removing, preparing or finishing different types of surfaces The sheets have a Velcro-backing for easy enclosure to the sanding machine and contains 11 perforations