These 5" Extra-Thick Sanding Interface Pads are meant to be used with 5" sanding discs to allow for more consistent results when sanding contours.
As shown below, the Extra-Thick 5" Sanding Interface Pads offer nearly twice as much padding as conventional, garden-variety foam interface pads. While many interface pads are about 1/2" thick, we offer a heftier 7/8" thick pad as shown below:

The 5" Sanding Interface Pad should be mounted between the face of the dual action sander and the sanding disc itself, as shown below:

