These discs aren’t your typical sandpaper. These use a Scotbrite™-like material instead, which are typically used instead of the higher grits of sandpaper used for polishing and finishing.
Material
Details
SMT800
Hi-quality non-woven disc for Steel & Stainless Steel finishing.
SMT850
Combination non-woven flap disc. Specially suited for machining TIG weld seams on Stainless Steel.