115mm Fibre Discs 24,36 Grit Zirconium Sanding Discs for 4-1/2" Backing Pad. Zirconium Fibre Sanding Discs for Die Grinder. A vailable in 24 grit, 36 grit. Used on a backing plate on the die grinder, resin fibre discs have an extensive scope of applications ranging from fine and coarse sanding, blending welds, deburring and de-rusting.
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