Abrasive floor sanding discs in a large 16" diameter with a 2" inner hole is ideal for most floor sanding machines PLUS Koffler won't make you buy more than you need to get the job done! Sold individually - no minimum purchase quantity 16" Abrasive Discs with a 2" Inner hole Grits available: 12, 16, 20, 36, 50, 60 and 80