Description8-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. Adds support to disc pad for improved abrasive cut and closer edges sanding.Features- Color: Black. - Size: 12.20X12.20X1.20cm/4.79X4.79X0.47 inch. - Material: Aluminum. - A sanding pad with dust collection holes works with sanders that have a dust collection system, which can suck dust and debris into the dust collection bag assembly. - Easy to install:The built-in mounting screw holes can help you quickly install it in a few minutes, and it will firmly cling for increased abrasive paper grip. - Fits most sander backing pad, enough for you to use and replace, to improve your whole work process. - Sander parts designed smooth sanding flat surfaces, prevents damage to disc holders. - Fine workmanship and creative appearance ensure its popularity and practicality.