Dynabrade 57850 3-2/3-Inch Wide by 7-Inch Length Vinyl-Face 3/8-Inch Thick Urethane Medium Density Non-Vacuum Dynabug Disc Pad, for PSA Discs, Orange Pad mounts with four screws High quality backup pad Weight-mated for smooth running and minimal tool vibration Ideal for PSA-type disc adhesion Remove abrasive adhesive paper liner and press abrasive to vinyl-face sanding pad Quick disc removal Ideal for sanding on bare wood, metal, plastic and fiberglass; prepare primed surfaces Industrial-rated for tough production performance