Sait 50170 4-1/2" x 7/8" SAIT-LOK 80-Grit Zirconium Fiber Discs 15pkSait SAIT-LOK 80-Grit Zirconium Fiber Disc. Zirconium grain. Closed coat structure for aggressive stock material and long life. Stainless steel, high tensile alloys. Ferrous and/or non-ferrous metals (iron, steel, welds, etc.). Tech Info: Resin over resin construction for a strong bond that is resistant to heat and moisture. Vulcanized fiber backing for heavy duty sanding. Available with SAIT-LOK quick change hub which extends disc life and requires fewer disc changes. .
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