Sait 50121 4-1/2" x 7/8" SAIT-LOK 36-Grit Aluminum Oxide Fiber Discs 15pkSait SAIT-LOK 36-Grit Aluminum Oxide Fiber Disc. Aluminum oxide grain. General purpose. Closed coat structure for more material removal and better finishing. Ferrous and/or non-ferrous metals. Wood, fiberglass, 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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