2 X 72 Inch Aluminum Oxide J Flex Cotton Finishing Belts (PRO)

$12.41 ~~$20.69~~ In stock

2 x 72 Inch Aluminum Oxide J Flex Purple Belts

Our ultra soft full cotton backed closed coat aluminum oxide sanding belts are designed specifically for use on metal. This industrial grade material features a load and heat reducing top coat, making it excellent for knife making and other metalworking applications. Also works great for edge work on profiling handles. Flex J-weight backing can handle spritzing but is not fully waterproof. Hand built in the USA.

Standard Pack Quantity: 6

Available Grits: 120, 220, 320, 400

Combo Pack Quantity: (1) 120G, (1) 220G, (1) 320G, (1) 400G for a total pack of 4

Weight: J-flex weight

Backing Material:cotton

Waterproof: No

Applications: Ideal for use on stainless steel, high and low carbon steel, nonferrous metals (aluminum, copper, titanium, nickel, etc.), hardwood and solid surface

Closed Coat

Joint: Bi-directional tape joint allows belt to run in EITHER direction (disregard arrows)

Grinding Aid: Load and heat reducing top coat

Bonding: Resin over resin

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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 (4.8 / 5 · 5 reviews)

Stella ★★★★★ Oct 22, 2026

Finally, a belt that doesn't load up and glaze over on stainless. The closed coat and ultra soft cotton backing let it flex into contours without chunking off, and it holds its edge through a full batch of knife handles.

Steven M. ★★★★★ Oct 21, 2026

The cotton backing on these belts is so much softer than the standard ones I've tried—it follows the contour of a steel edge without gouging. Closed coat means they keep cutting long after I expected them to dull.

Isabella ★★★★★ Oct 19, 2026

Finally, a belt that doesn't scorch the steel—the closed coat aluminum oxide lays down a smooth finish on my knife bevels without loading up. The full cotton backing is pliable enough to hug a contour but still holds its edge for a solid session. This is my new go-to for blending and finishing.