Sanding disc with holes 1.High grade and stable quality abrasive disc; 2.Sand disc. Sanding disc with holes1) Grain: alumina, silicon carbide, zirconia ... , 180mm, 200mm, 230mm, 406mm;4) Hole: no holes, 1 hole, 5 holes, 6 holes, 8 holes, 9 holes, 16 holes or more;5)Application: used for surface ...