FESTOOL Saphir 5″ Diameter Sanding Disks

Saphir is coarsest, most aggressive abrasive in the Festool family.
Saphir is for heavy duty, coarse sanding of wood, plastics, fiberglass, composites, paint, and stucco, and for such rugged tasks as removing corrosion from weathered steel and hull work on boats. Use it on hard materials and in difficult areas – heavily worn stairs would be a good example – where standard abrasives just don’t hold up. It offers exceptional services life because of its high tear-resistant fabric backing and heat-resistant bonding coat.