1/2 Thickness Rubber, Medium Density, 5/16-24 Male Thread Sanding Pads are perfectly weight-mated to Dynabrade tools, for achieving consistent swirl-free finishes. 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.