Supergrit Abrasives

7" Zirconia Edger Discs – 5/16" or 7/8" Arbor

7" Zirconia Edger Discs – 5/16" or 7/8" Arbor - Main image
$7 $10 In stock

7" Zirconia Edger Discs – 5/16" or 7/8" Arbor

Heavy-duty zirconia edger discs designed for aggressive sanding, grinding, and surface preparation on wood, metal, fiberglass, and composites. Zirconia abrasive is known for its fast cutting action, long life, and self-sharpening properties, making these discs an excellent choice for demanding sanding applications.

Common Uses:

  • Floor edging and sanding in hard-to-reach areas
  • Aggressive stock removal on wood
  • Paint, rust, and coating removal
  • Metal grinding and weld cleanup
  • Surface preparation before finishing or coating
  • Sanding fiberglass and composite materials

Why Zirconia?

  • Cuts faster than standard aluminum oxide
  • Longer lasting abrasive for extended use
  • Self-sharpening grain stays aggressive longer
  • Handles high-pressure sanding applications

Arbor Options:

  • 5/16" Arbor – Fits compatible portable edger and specialty sanding equipment
  • 7/8" Arbor – Common fit for floor edgers and industrial sanding machines
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Christopher C. ★★★★★

Took these out on an aluminum job and the zirconia grit held up way better than the old discs I was using—no loading up or glazing mid-pass. The 7/8 arbor seated solid, and I got through a full day of grinding without swapping to a fresh one.

Victoria N. ★★★★★

The 7/8" arbor fit my angle grinder perfectly, and these discs cut through a fiberglass boat hull much faster than the aluminum oxide ones I used before. Just wish they lasted a bit longer on really tough composite work.

Alexander ★★★★★

These discs handled the rough grinding I needed on a metal table frame without loading up. The zirconia grit stayed sharp much longer than my old aluminum oxide ones.