General description Premium sanding sheets provide excellent sanding performance on wood, metal, and plastic. Made from industrial aluminium oxide (AO), these sheets offer a great combination of strength, hardness, and durability. The hook and loop system allows for quick removal and replacement. Technical specifications Size: 114mm x 102 1/4'' Grit: Mixed Material: Industrial aluminium oxide (AO) Dust extraction holes: 3 + 3 Usage The grit size determines the smoothness of the finish. The lower the grit, the rougher the sandpaper; conversely, the higher the grit number, the smoother the sandpaper. Here’s a guide to help you choose the right grit for your application: 40-60: Coarse - Heavy sanding and stripping, roughing up the surface. 80-120: Medium - Smoothing of the surface, removing smaller imperfections and marks. 150-180: Fine - Final sanding pass before finishing the wood. 220-240: Very Fine - Sanding between coats of stain or sealer. 280-320: Extra Fine - Removing dust spots