Up to 4 times faster than a Bosch R444 fiber disc. Removing weld seams from metal workpieces is labor-intensive and time-consuming. When the process can be accelerated, the Prisma fiber disc allows professional users to work significantly more efficiently. With the EXPERT R781 Prisma Ceramic fiber disc, you can grind much faster. Bosch Prisma Ceramic features sharp triangular grains that cut more effectively than broken ceramic grains. This highly efficient disc generates less surface heat during use, allowing you to grind longer and faster. Additionally, the self-sharpening effect ensures that the high removal rate is maintained throughout its lifespan. With the Bosch EXPERT R781 Prisma Ceramic fiber disc, you can grind metal much faster than with conventional discs, without compromising on quality. This enables professional angle grinder users to work more productively. It has a 16 mm bore diameter for standard angle grinders with a clamping nut.