Zirconia Resin Fiber Disc's Features: Premium abrasive cloth provides up to 15x longer life than fiber discs. Zirconia grit for 3X faster material removal than fiber resin discs. Type 29 fiberglass backing provides optimum (10°-25°) grinding angle, allowing full use of the discs. Won't mar work or splinter during use. 120 Grit. 7/8 Arbor.
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