Up to 4 times better dust reduction than with Bosch C420 sandpaper. When sanding workpieces with flat surfaces as well as curves and edges, you need different sanding blocks to find the right one for the shape you are working on. We have combined the hard side and the soft side of the EXPERT Dual Density sanding block to simplify this process. You can sand both flat surfaces and curves and edges with minimal dust. This sanding block is used with EXPERT M480 sanding nets, 80 x 133 mm, and is a versatile sanding block for sanding workpieces with complex shapes. It has a high-density side for sanding surfaces and a low-density side for curves and edges. Both sides feature a hook-and-loop fastening for easy attachment and removal of the M480 sanding nets. Our Bosch Particle Control technology ensures that dust enters the sanding net without clogging it. When sanding performance decreases, it can be removed from the EXPERT Dual Density sanding block, shaken out, and reattached. This makes it more durable than conventional sandpaper. Additionally, it is tear-resistant. The EXPERT Dual Density sanding block is effective accessory for carpenters, painters, and drywallers who need a versatile, dust-free sanding block for sanding surfaces, contours, and edges. Easy attachment with hook-and-loop fastening.