Pferd Inc. offers CC-Grind-Flex semi-flexible grinding discs that blend weld seams on large surfaces without leaving dents or bumps typical of a rough grinding wheel or fiber disc. This is due to the disc design that integrates a layered fiberglass backer with a high-performance coated abrasive. The geometry of the cooling slits ensures high air flow that reduces the thermal load on the grinding discs and workpiece. When using the disc, an absolutely flat surface can be achieved. They are available in 4 1/2-in. and 5-in. diameters with 7/8-in. bore.