AICHI ACUTO440 Japanese steel for exceptional sharpness, edge retention, and corrosion resistance
Lab-tested rust resistance proven to withstand 50 days submerged in water and up to 100 dishwasher cycles.
3.5” blade for precision prep and handheld tasks
Ergonomic rounded spine and bolster for a more comfortable pinch grip

Rust-Proof

ACUTO440 Steel

All Chop Styles

Use & Care

Hand wash
Dry immediately after use
Sharpen every 4–6 months
Heads up: High-carbon knives may show discoloration after exposure to acidic foods and/or salt. This is purely cosmetic and different from rust, which is extremely rare.
Visit our Help Hub for more on how to use and care for this knife.

Let Us Handle the Sharpening

Mail-In Knife Sharpening (on any knife)
Free shipping, starting at $11 per knife.

Specifications

Blade Length: 3.3 in. / 85 mm

Total Length: 7.6 in. / 195 mm

Weight: 0.18 lb / 84 g

Steel: AICHI ACUTO 440 (Japan)

HRC: 58±2

Grind & Edge: 50/50 Symmetrical, 14° per side

Handle Material: Polyoxymethylene

Country of Production: PRC

Warranty

All Misen products come with a lifetime warranty against defects. Misen will replace any defective products. Learn more about our warranty policy here and what's covered.

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3.5" Paring Knife (ACUTO440) - Blue

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What are Misen’s ACUTO440 Knives made of?

Our ACUTO440 Knives are made with AICHI ACUTO440, an exceptionally corrosion-resistant Japanese high-carbon stainless steel. AICHI ACUTO440 is rust-proof, incredibly durable, and has excellent edge retention. What that means for you: less time cleaning and sharpening, more cooking.

What’s the difference between Misen’s ACUTO440 Knives and classic knives?

All of our knives are made from high-carbon stainless steel, which is what gives them their razor-sharpness and excellent edge retention. However, our ACUTO440 Knives have a much higher chromium content (about 18%), which makes them significantly more corrosion (aka rust) resistant.

Our ACUTO440 Knives also feature a rounded spine and heel (the back of the knife where the blade meets the bolster), creating a more comfortable grip over long prep sessions.

How are Misen’s ACUTO440 Knives different from other high-carbon knives?

We wanted our ACUTO440 Knives to be high-performance tools that you could still leave in the sink overnight if you needed to. That’s why our ACUTO440 Knives are made with AICHI ACUTO440, a Japanese high-carbon stainless steel that is more durable and easier to care for than other high-carbon knives, which are prone to rusting and/or chipping without proper care.

What do you mean by rust-proof?

Our ACUTO440 Knives are made with AICHI ACUTO440 steel, an exceptionally corrosion-resistant Japanese high-carbon stainless steel. Our knives have been lab-certified to withstand up to 100 dishwasher cycles, as well as 50 days of being submerged in water, without showing any signs of rust.

Can I put Misen’s ACUTO440 Knives in the dishwasher?

While our ACUTO440 Knives have been lab-certified to withstand up to 100 dishwasher cycles without showing any signs of rust, we generally recommend hand washing all of your Misen knives. Because our knives are extremely sharp, when they get jostled around in the dishwasher, the blade can cut through the soft materials that make up your dishwasher racks. Dishwashing can also damage your knives if the blade edge bangs against hard objects like flatware or pots and pans during the washing cycle.

How often should I sharpen my knives?

Whenever you start to notice your knife is slicing and dicing a little less crisply than usual, it’s time to sharpen. Although our ACUTO440 Knives can go long periods between sharpenings, we generally recommend getting them sharpened about twice a year for best performance. We also recommend regularly using a honing rod between sharpenings to keep your knife edge in good shape.

My blade has discoloration and/or staining. What is this?

While our ACUTO440 Knives are rust-proof, all high-carbon knives can experience some discoloration and/or staining with prolonged exposure to acidic foods and/or salt. This is purely cosmetic and is not the same as rust.

Why the 3.5" Blue Acuto Paring Knife Is Ideal for Precision Prep

The 3.5" Acuto440 Paring Knife is built for the detail work that larger knives can't handle — hulling strawberries, peeling stone fruit, trimming herbs, or scoring delicate garnishes. The short blade gives you close control whether you're working on a cutting board or holding the ingredient in your hand. ACUTO440 steel holds a sharp edge well and is easy to maintain, making this a reliable everyday companion for small-scale prep tasks.

If you find yourself reaching for this knife constantly, it pairs naturally with the rest of the Acuto440 blue lineup. The 3-Piece Knife Set in Blue adds a chef's knife and a bread knife to round out a complete kitchen setup, while the 5.5" Nakiri Knife in Blue is a great complement for precision vegetable work on the board. All Misen knives come with a lifetime warranty against defects.

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Basically a Navy Seal

Rust-proof after 100 dishwasher cycles.

Because it’s got more chromium than standard high-carbon stainless, ACUTO440's rust resistance is a lab result, not a marketing claim.

Works Harder, Stays Sharper

Holds a razor edge through heavy prep.

At 58±2 HRC, ACUTO440 has incredible edge retention without brittleness. That means you can put off sharpening it for longer.

Questions?

Customer Reviews

4.9

Rated 4.9 out of 5 stars

Based on 2,908 reviews

5 Rated out of 5 stars

2.7k

Total 5 star reviews: 2.7k

4 Rated out of 5 stars

164

Total 4 star reviews: 164

3 Rated out of 5 stars

Total 3 star reviews: 23

2 Rated out of 5 stars

Total 2 star reviews: 2

1 Rated out of 5 stars

Total 1 star reviews: 0

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2,908 reviews

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Jean F.

Verified Buyer

I recommend this product

Rated 5 out of 5 stars

3 days ago

3.5 inch Paring Knife

These knives are very well made, they are solid and a knife that I use every day. The colors are a fun addition to my kitchen .

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Georganna A.

Verified Buyer

I recommend this product

Rated 5 out of 5 stars

3 days ago

Perfect

Just what I needed: sharp, perfect size, easy to use. Perfect for my everyday cooking tasks.

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Patricia B.

Verified Buyer

I recommend this product

Product Standouts sharp, easy-to-use, good balance, comfortable handle, nice weight

Rated 5 out of 5 stars

4 days ago

One 3.5 inch knife is not enough.

I bought three of these knives over the years. After I accidentally threw one out, I bought two more so I'll always have this knife in my house. It's the best knife for a lot of different uses. I also have multiples of other sizes of Misen knives. I think they are the best, hands down.

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Yes, this review from Patricia B. was helpful. 0 people voted yesNo, this review from Patricia B. was not helpful. 0 people voted no

David J. S.

Verified Buyer

I recommend this product

Product Standouts sharp, comfortable handle, premium materials, nice weight, well-priced

Rated 5 out of 5 stars

1 week ago

AUS-10 /3.5 “ Paring Knife

Sharp as a razor and works like a charm right out of the box!! Very comfortable to use.

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YVONNE S.

Verified Buyer

I recommend this product

Product Standouts sharp, easy-to-use, good balance, comfortable handle, well-priced

Rated 5 out of 5 stars

2 weeks ago

A new paring knife!!

Handy,multi use

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