Misen bread knife with serrated blade and blue handle

5" Serrated Knife (ACUTO440) - Blue

5" / Blue
$99.00
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Misen bread knife with serrated blade and blue handle
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  • 5" Serrated Knife (ACUTO440) - Blue
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  • Misen bread knife with serrated blade and blue handle
  • Hands segmenting a peeled orange over a glass bowl on a wooden cutting board
  • 5" Serrated Knife (ACUTO440) - Blue
  • Misen serrated utility knife with blue handle, stainless steel blade
  • Misen steak knife with serrated blade and blue handle close-up
  • Smoked salmon bagels with cream cheese, red onion, capers, and dill on a wooden cutting board with a Misen serrated knife
5" Serrated Knife (ACUTO440) - Blue

624 Reviews

5" Serrated Knife (ACUTO440) - Blue

$99.00

Our rust-proof serrated knife, made with next-generation ACUTO440 steel. Wave-shaped serrations glide through crusty, soft, and/or squishy foods without tearing.

Size: 5"
Color: Blue
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60-Day Test Drive
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Lifetime Warranty Against Defects
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Features
  • AICHI ACUTO440 steel for pro-level sharpness and edge retention
  • Lab-tested rust resistance proven to withstand 50 days submerged in water and up to 100 dishwasher cycles.
  • Wave-style serrations for smooth slicing with less tearing
  • Ergonomic rounded spine for a comfortable pinch grip
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Rust-Proof
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ACUTO440 Steel
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Serrated Blade
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
Specifications

Blade Length: 5 in. / 127 mm
Total Length: 10 in. / 253 mm
Handle Thickness: 28 mm
Blade Height: 17 mm
Weight: 4.8 oz / 136 g
Steel: AICHI ACUTO 440 (Japan)
HRC: 58±2
Grind & Edge: Single blade, 18 wide-set serrations
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.

Pair it with

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.
Sliced salami and mozzarella sheet pan pizza on parchment paper being cut with a Misen chef's knife
Misen bread knife slicing dark sourdough loaf on wooden cutting board

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?

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.

Customer Reviews

4.9
Rated 4.9 out of 5 stars
Based on 624 reviews
Total 5 star reviews: 587 Total 4 star reviews: 32 Total 3 star reviews: 5 Total 2 star reviews: 0 Total 1 star reviews: 0
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624 reviews
  • Susan W.
    Flag of United States
    Verified Buyer
    Reviewing
    8 inch Serrated Knife - AUS-8 - Final Sale
    I recommend this product
    Product Standouts sharp, good balance, comfortable handle
    Rated 5 out of 5 stars
    1 week ago
    Most used knife

    This knife is almost out on our counter because we use it every day to slice breads and bagels. It is angled perfectly to obtain thin or thick slices. It has maintained its sharpness, and I have purchased several as gifts.

    Was this helpful?
  • Anthony S.
    Flag of United States
    Verified Buyer
    Reviewing
    10 inch Serrated Knife - AUS-8 - Final Sale
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Great bread knife

    Nice bread knife! Cuts really well!

    Was this helpful?
  • Kyle B.
    Flag of United States
    Verified Buyer
    Reviewing
    10 inch Serrated Knife - AUS-8 - Final Sale
    I recommend this product
    Product Standouts sharp
    Rated 4 out of 5 stars
    1 week ago
    Great knife

    Quality is great, as has been all of my Misen products to this point. Knife is super sharp. Cut into my cutting

    board pretty good trying to get through an overcooked crust. Only reason the knife isn’t 5 starts is I feel like the handle puts your hand too close to the cutting board when trying to get through the bottom of a loaf of bread. This lead to me using the tip of the knife more than I would like to get through the crust. Which is why I cut into my cutting board so much. Over still very pleased with the purchase.

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  • Michael B.
    Verified Buyer
    Reviewing
    Personalized 5" Serrated Knife (AUS-8) - Final Sale
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Wow that's sharp

    I love Misen. I have a couple pans and now purchased a third knife. Did I need it? No. Was the price right and did I trust the quality? Yes! The personalization option, for free, sealed it for me.

    When I tried it the first time it just confirmed it was a great decision. Super sharp, the right size and I absolutely love it.

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  • Eric W.
    Flag of United States
    Verified Buyer
    Reviewing
    8 inch Serrated Knife - AUS-8 - Final Sale
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    Sharp and cuts great

    We have tried it on sourdough bread and typical knives made it difficult. This knife was amazing

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Why the 5" ACUTO440 Serrated Knife Is Essential for Bread and More

The 5" ACUTO440 Serrated Knife is built around a rust-proof steel that holds a keen edge through repeated use on the foods that punish lesser blades — crusty sourdough, ripe tomatoes, soft brioche. The wave-shaped serrations grip and glide rather than compress and tear, so each slice comes away clean whether the crust is shattering or the interior is pillowy soft.

ACUTO440 is a next-generation stainless steel that resists corrosion without sacrificing sharpness, making this knife as practical for everyday care as it is for performance. If you want to build out a full ACUTO440 kitchen, pairing this with the 8" Chef's Knife in Blue covers most cutting tasks, while the 5.5" Utility Knife handles smaller precision work in between. For those who prefer a complete matched set, the 7-Piece ACUTO440 Knife Set in Blue brings everything together in one go.