15-Hole Sanding Discs for 150mm DA Fitment and Dust Control

How 15-hole dust extraction actually works

The 15 holes in the disc align with 15 matching ports in the backing pad. When a vacuum or dust extractor is connected to the sander, suction is drawn through those ports and out through the disc holes, pulling sanding dust away from the panel surface as you work rather than letting it settle back onto the area you just prepared.

The practical results: less dust obscuring the surface as you sand, less debris embedding into the abrasive grain and causing premature loading, and a cleaner working environment overall. In a spray booth environment, where surface cleanliness before paint is critical, this is a meaningful performance difference.

The important distinction is that fixed-pattern systems and multi-hole systems solve the same problem in different ways. Current 150mm pad systems from brands like Festool and 3M push harder into active dust transport and reduced alignment sensitivity, while 15-hole remains a practical fixed-format choice when you know your pad is built around it.

That means a 15-hole disc is not automatically the best answer for every 150mm machine. It is the right answer when your current setup is actually 15-hole, and a wrong answer when the pad face is built around another pattern.