Up to 2 times longer lifespan for multi-hole discs compared to a standard backing pad. Multi-hole sanding papers promise higher effectiveness, longer accessory life, and a better working environment without dust. However, 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 with 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 orbital sanders is indispensable if you want to sand dust-free. You will benefit from better air quality, high-quality work, and a longer lifespan for sanding discs. 150 mm backing pad for Bosch random orbital sanders. Design: soft, diameter mm: 150, hole pattern: multi-hole, compatible with: GEX 125-150 AVE Professional.