Extraction: Pre-punched with 8 precise holes for efficient extraction, avoid the trouble of manual punching, save for time and energy Aluminum Oxide Sandpaper: Sanding pad features good abrasion resistance, anti-static and anti-clogging Hook and Loop Backing: Self-abrasive sanding paper is strong and long lasting, for easier and quicker sandpaper changes, saving your effort 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 Widely applications: Sander pads is suitable for polishing, painting, putty, electronic products, metals, aluminium alloys, and so on, Manufacturer: XIAOQENAN