Professional Surface Preparation & Finishing Set. Durable Fiber Backing – Provides strength and tear resistance for extended disc life. Hook & Loop Attachment – Fast, secure disc changes with standard 5"" backing pads to deliver smooth, even results. Versatile Applications – Ideal for wood, metal, paint, fillers, and composites. Works with Most Orbital & DA Sanders – For sanding, blending, and surface prep. Includes 6 Assorted Grits – 60, 100, 180, 280, 400, and 800