... , paint, wood, stone, metal and so on .Velcro disc with holes is better for the strips go out .So the work ... surface.Size: 2”(50mm), 3”(75mm), 4”(100mm), 5”(125mm), 6”(150mm), 7”(180mm).Grit: 40#, 60#, 80#, 120#, 150#, 180 ... #, 1200#, 1500#.Hole Type: No hole, 1hole, 5 holes, 6 holes, 7 holes, 8 holes, 16 holes or as customers request.Backing: C, D, E, F ...