180mmØ Heavy duty aluminium oxide grit, vulcanised fibre backed floor sanding discs. Extremely tough and tear resistant, fully resin bonded construction ensures long service life even when used in very tough applications. Suitable for use where normal paper backed floor sanding discs are not up to the job. Will cope with rough wood and nails with ease. For use with orbital floor sanders such as Clarke Super 7R or Hiretech HT7.