8-hole design on each pad prevents dust from clogging sander machine allowing easy cleaning to prolong tool life Suitable for uneven surface polishing such as wooden bowls, protection against damage to backing pad, convenient replacement. One side is HOOK face, can stick with H&L sanding discs, another side is LOOP face, can stick on H&L sanding pads. Constructed of soft durable sponge which allows the technician to follow contours and get closer to edges while minimizing burn through Adds support to disc pad for improved abrasive cut and closer edge sanding colour:Gray + black Material:sponge size:125mm Package Contents: 40 x 8-Hole Soft Sponge Interface Pad Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.