Up to 4x faster than standard fibre discGrinding down welds on fabricated metal workpieces is tough and time-consuming. If the process can be speeded-up, there is a significant efficiency gain for the skilled craftsmen who do this job. And with the Expert R781 Prisma Ceramic Fibre Disc can grind much, much faster.Bosch Prisma Ceramic offers a grain of perfectly sharp triangles which cut more effectively than even standard ceramic grains. This highly efficient disc generates less surface heat as work, allowing to grind faster, for longer. Additionally, a self-sharpening effect ensures this speed advantage is maintained over a long lifetime.The Bosch Expert R781 X-LOCK Prisma Ceramic Fibre Disc for Metal allows to grind metal much faster than conventional discs, with no compromise on quality. It therefore offers a leap forward in productivity for professionals using angle grinders.Click it on with X-LOCK – the fastest accessory-changing system on the market. Also fits nut and thread angle grinders. Technical data: Disc diameter mm: 125 Bore diameter mm: 22,23 Grit: 80 X-LOCK