Supergrit Abrasives

4" X 5/8" - 11 IMPORT (MERCER) STAINLESS STEEL KNOTTED CUP .020

4" X 5/8" - 11 IMPORT (MERCER) STAINLESS STEEL KNOTTED CUP .020 - Main image
$11.4 $19 In stock

This 4-inch stainless steel knotted cup brush is designed for heavy-duty surface preparation and cleaning tasks. Its knotted wire construction provides aggressive action for removing rust, scale, and weld splatter.

  • 4-inch diameter with 5/8"-11 threaded arbor for compatibility with standard angle grinders.
  • Made from stainless steel wire for corrosion resistance and durability.
  • Knotted cup design offers fast cutting and long service life.
  • Available in single or pack of 2 quantities.
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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)

Alexander ★★★★★

Tackled a heavy rust patch on an old trailer hitch with this cup brush last weekend—the .020 stainless steel knots chewed through it faster than I expected. Fit my angle grinder perfectly with the 5/8-11 arbor.

Avery B. ★★★★★

The knotted wires on this cup brush are thick and stiff, tearing through old paint and rust on my steel gate in minutes. It held up well to heavy pressure without any wires flying loose. Exactly the aggressive cleaning power I needed for tough jobs.

Eli J. ★★★★★

Switched from a different brand's brush to this one, and the .020 wire feels noticeably sturdier—it ripped through caked-on rust on an old trailer hitch in under two minutes without losing its shape.