The 3M Pro Grade sanding disc is designed to provide great coverage while sandingwood and more, has a sharp abrasive mineral for a fast cut. Use wet or dry. They are ideal for coarse sanding or stripping on multiple surfaces, including wood, metal and fiberglass. Use them on oil enamel, latex primer, lacquer, sanding sealer and other coatings. 0.65"L x 5.21"W x 5.9"H.