What do the three slots do?

The coarse slot grinds a dull or damaged edge back into shape, the fine slot hones it, and the ceramic slot polishes it for a smoother cut. Work from coarse to ceramic for a full sharpen, or just use the fine and ceramic slots for upkeep.

Does it work on serrated or ceramic knives?

Pull-through sharpeners like this are made for plain-edge steel knives. Serrated edges and ceramic blades need different tools, so keep those away from the slots.

How often should I sharpen?

Use the fine and ceramic slots every few uses to keep an edge, and the coarse slot only when the knife is genuinely dull. Overusing the coarse slot wears the blade down faster.

Will it stay put on the counter?

The base has non-skid rubber feet to hold it steady while you pull the knife through. Press down on the handle for extra stability.

Wipe the body with a damp cloth and brush metal dust out of the slots. It is not meant to be submerged in water.

Where is the 3-Stage Professional Knife Sharpener cheapest?

At Deal.ai, for $2.79, as of our latest check.

3-Stage Professional Knife Sharpener

Sold and shipped by Deal.ai

$2.79+ $7.53 shipping

Shipping is combined: each extra item adds only a little.

Color: Black with red

Quantity: 1pc

Arrives about Nov 19–29, from a warehouse in China

30-day full refund: if you're not happy with it for any reason, or it never arrives, tell us within 30 days and we refund you in full. Shipping and refunds

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Price facts

Lowest price today: $2.79 at Deal.ai (checked Nov 12, 2026).

Our take on the 3-Stage Professional Knife Sharpener

This is a manual three-slot knife sharpener with a matte black body, red trim and polished metal accents around the slots. The three slots are labeled coarse, fine and ceramic, so one tool covers dull edges, honing and a final polish. Non-skid rubber feet hold it steady on the counter, and the large handle gives a firm grip. It suits home cooks who want a quick pull-through sharpener without stones or a powered machine. Against electric sharpeners it is quieter, simpler and needs no power; against a whetstone it removes less metal control but takes far less skill and time.