Long lifespan when sanding various materials! The film backing ensures a high material removal rate and a great finish. Not all sanding discs are equally suitable for different materials and applications. The EXPERT O780 Foil is versatile, tear-resistant, and durable, allowing you to easily perform various wet and dry sanding tasks. With a single sanding disc, you can remove old paint and rust from metal and wood, while also giving your workpiece a fantastic finish. The EXPERT O780 Foil combines Ceramic Technology – strong, self-sharpening ceramic grains – with an innovative film backing to ensure that you can sand a variety of materials over and over again. Durability without turbulence thanks to Bosch Ceramic Technology.