Aluminum Oxide Sandpaper : Sanding pad features good abrasion resistance , anti-static and anti-clogging Size : approx 185x93mm / 7.28x3.66 inches Grit Type : 40 / 60 / 80 / 100 / 120 / 180 / 240 , you can choose or more according to your needs Extraction : Pre-punched with 8 precise holes for efficient extraction , avoid the trouble of manual punching , save for time and energy Hook and Loop Backing : Self-abrasive sanding paper is strong and long lasting , , for easier and quicker sandpaper changes , saving your effort Widely applications : Sander pads is suitable for polishing , painting , putty , electronic products , metals , aluminium alloys , and so on, Manufacturer: Watreketal