2 X 72 Inch Aluminum Oxide J Flex Cotton Finishing Belts

$22.07 ~~$34.49~~ 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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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)

Madison G. ★★★★★ Oct 22, 2026

I used these on my stainless knife blades and the closed coat aluminum oxide cut way faster than the generic belts I had before. The cotton backing is soft enough to follow contours without gouging the metal.

Carter S. ★★★★★ Oct 21, 2026

The J Flex backing on these 2x72 belts is surprisingly supple, so they hug curved metal surfaces without any stiffness. I used one for a full hour on stainless and the closed coat aluminum oxide stayed sharp the whole time, no glazing or excessive wear.

Victoria ★★★★★ Oct 20, 2026

The cotton backing on these belts is exactly why I grabbed them, and it makes a huge difference on metal—no tearing or shredding even under pressure. The closed coat aluminum oxide keeps the grit cutting smoothly for a long time, so I’m not swapping belts every few minutes.