United Abrasives Sait Z Series Type 27 60X Grit Premium Zirconium Ovation® Attacker® Flap Disc measuring 4 1/2" Dia X 7/8" features cotton backing that provides soft-acting as well as fast cutting. Flap disc with a speed of 13300 RPM is good on irregular surfaces and does not adulterate stainless steel. It features high density on fiberglass backing plate and is applicable for stainless steel, high tensile steel, titanium, non-ferrous as well as ferrous metals. It provides aggressive cutting action and admits the use of light pressure. It is used in weld grinding, finishing, blending, deburring as well as contour finishing and is sold as 10 per box.