The Tork Craft Flap Disc Zirconium 115mm Angled, model TCFD115-4- (full codes like TCFD115-4-60 for 60 grit) is a premium conical (angled) flap disc upgraded with zirconium oxide (ZrO2) abrasive. This makes it significantly more durable and aggressive than the aluminum oxide version (like the TCFD115-2- series you asked about before).
Zirconium discs self-sharpen as they wear (grains fracture to expose fresh edges), run cooler, and last 2-3x longer on tough materials—ideal for heavy-duty grinding where the basic Alu/Oxd might glaze or wear out quickly.














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