The Standard Abrasives™ Quick Change Felt Polishing Disc is made with nonwoven felt fibers, which, like cotton, are soft, pliable and elastic. The spongy and responsive nature of these felt fibers prevents the abrasive from gouging or denting the substrate. In fact, the Standard Abrasives™ Quick Change Felt Polishing Disc is a sanding disc to use for the final step in a sequence, because it helps the workpiece shine without significantly altering its dimensions. Its light scratch requires light pressure, so users can achieve a desirable finish without too much operator fatigue.