Neiko 30261A 5-Inch Vinyl Face PSA Sanding Pads for Dual Action Air Sander, 10,000 RPM Blue pressure sensitive adhesive backing design sticks onto flat vinyl surfaces and is most ideal for woodworking projects Fast and durable oscillating speed operates at 10,000 RPM standing up to high frequency achieving a consistent, smooth finish High quality polyurethane material build is lightweight and allows a flexible but firm touch without feeling stiff for maximum control Replacing old back pads extends the service life to get random orbital sander working like new for perfect results Universal standard backing disc size 5" x 5/16" with 24 threads is strong with a rigid body to fit most air sanders