Velcro discs are made for the price concious user. They come in boxes of 50 discs, and are suitable for sanding woods, paints, car bodywork and filler. Having a 150mm diameter, and velcro backing, their hole configuration makes them suitable for most manufacturers backing pads, including Bosch, Festool, Makita, DeWalt etc, and the 15 hole configuration allows for extraction on even the multi hole versions.