Dust Reduction Sanding Wood, Paint, and Drywal! When sanding workpieces with flat surfaces as well as curves and edges you need a couple of different sanding blocks to have the right one for the shape you’re working on. We bonded the hard side and the soft side of this EXPERT M480 Sanding Net Dual Density 80x133mm Sanding Block together to make it simpler. You can use it for low-dust sanding of surfaces as well as curves and edges. The EXPERT M480 Sanding Net Dual Density 80x133mm Sanding Block is an effective accessory for woodworkers, painters, and drywallers who need a versatile, low-dust sanding block to sand surfaces, contours, and edges.