Longer lifespan when sanding wood and paint! The sanding sponge ensures even pressure on the surface. Sometimes there is no alternative to hand sanding. The problem was that conventional sanding sheets wore out quickly when sanding curves and edges. They often became clogged or broke. The only solution was to buy many sanding sheets, leading to high consumption and a lot of waste. Today, there are sanding sponges with Bosch Surface Structure. Square sanding sponges are ideal for sanding flat surfaces and 90-degree edges. The Bosch EXPERT sanding sponge Standard Block is a revolution in hand sanding. Once you've used it, you'll never want anything else. Strong, flexible bonding of the sanding grains with the fleece thanks to Bosch Surface Structure.