Up to 2 times longer lifespan for multi-hole sanding discs compared to a standard backing pad. Multi-hole sandpapers promise higher effectiveness, a longer lifespan for accessories, and a better working environment without dust. To fully benefit from this "dust-free" revolution, you need a compatible backing pad. The Expert Multihole backing pad is an essential component of Bosch's Particle Control System. The seemingly random distribution of holes is the result of extensive research: mathematically, there are always enough holes aligned on the paper to ensure optimal dust extraction. This means your discs won't clog and will last longer. It is available in hard, medium, and soft versions, depending on the type of sanding. The Bosch Expert Multihole backing pad for random orbit sanders is indispensable if you want to sand without dust. You'll benefit from better air quality, high-quality work, and a longer lifespan for sanding discs. 150 mm backing pad for Bosch random orbit sanders. Design: hard, diameter: 150 mm, hole pattern: multi-hole, compatible with: GEX 125-150 AVE Professional.