High-speed grinding of metal! The Prisma fiber disc remains sharp longer due to the self-sharpening effect. 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 much more efficiently. With the EXPERT R781 Prisma Ceramic fiber disc, you can grind significantly faster. The Bosch EXPERT R781 X-LOCK Prisma Ceramic fiber disc enables much quicker metal grinding compared to conventional discs, without compromising on quality. It therefore supports professional angle grinder users in working more productively. Faster material removal with Bosch Prisma Ceramic technology.