Misen serrated bread knife with black handle and stainless steel blade

5" Serrated Knife (ACUTO440) - Black

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

84 Reviews

5" Serrated Knife (ACUTO440) - Black

5 Inch Serrated Knife, ACUTO440, Black

$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: Black
The image depicts a series of two icons, a circular icon containing an image that resembles a clock and a square icon containing an image that resembles a house. The icons appear to represent trust-related concepts.

60-Day Test Drive

The image, which appears to be a black-and-white icon, depicts a stylized checkmark within a seal shape. It is likely an icon representing a warranty or guarantee.

Lifetime Warranty Against Defects

The image shows an icon depicting an arrow with a solid arrowhead pointing left, inside a box, which typically symbolizes returns or a return policy.

Free Returns

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
Rust-proof feature icon with spark symbols

Rust-Proof

3D box or cube geometry icon representing steel type or material structure

ACUTO440 Steel

Serrated blade edge icon showing jagged cutting teeth

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

5.0
Rated 5.0 out of 5 stars
Based on 84 reviews
Slide 1 selected
Write a Review (Opens in a new window)
84 reviews
  • Audra A. B.
    Verified Buyer
    Reviewing
    8" Serrated Knife (ACUTO440) - Black
    I recommend this product
    Rated 5 out of 5 stars
    3 minutes ago
    Percusion

    This is a precision knife and a delight to own. Smooth clean cuts. I love it.

    Was this helpful?
  • Robert P.
    Verified Buyer
    Reviewing
    5" Serrated Knife (ACUTO440) - Blue
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    5” aerated knife has become our most used knife

    It’s just the right size. Not too big and not too small.

    Was this helpful?
  • Susan W.
    Flag of United States
    Verified Buyer
    Reviewing
    8" Serrated Knife (ACUTO440) - Blue
    I recommend this product
    Product Standouts sharp, good balance, comfortable handle
    Rated 5 out of 5 stars
    3 months 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?
  • Michael B.
    Verified Buyer
    Reviewing
    Personalized 5" Serrated Knife (AUS-8) - Final Sale
    I recommend this product
    Rated 5 out of 5 stars
    3 months 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.

    Was this helpful?
  • Eric W.
    Flag of United States
    Verified Buyer
    Reviewing
    8" Serrated Knife (ACUTO440) - Blue
    I recommend this product
    Rated 5 out of 5 stars
    4 months ago
    Sharp and cuts great

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

    Was this helpful?
Show More

5 Inch Serrated Knife, ACUTO440, Black

The 5" Serrated Knife (ACUTO440) in Black is built for the everyday jobs where a straight edge can struggle, like slicing crusty bread, ripe tomatoes, and other soft or squishy foods. Its wave-shaped serrations are designed to glide through food with less tearing, and the next-generation ACUTO440 steel is engineered to be rust-proof for practical, day-to-day cooking. If you are comparing shapes and sizes, you can browse more options in the Serrated Knives collection.

One of the standout benefits here is confidence around moisture. This blade uses ACUTO440 steel with lab-tested rust resistance that is proven to withstand 50 days submerged in water and up to 100 dishwasher cycles. That matters for a serrated knife you reach for often, whether it lives near the cutting board or gets used for quick snacks and lunch prep.

The compact 5-inch blade length is easy to control for smaller, high-precision cuts, and the knife is sized for everyday reach and maneuverability (10 inches total length, 4.8 oz). Misen also includes an ergonomic rounded spine intended to support a comfortable pinch grip, which can make repetitive slicing feel more natural.

For care, the product guidance is straightforward: hand wash, then dry immediately after use, and sharpen every 4 to 6 months. There is also a helpful note for high-carbon knives, exposure to acidic foods and or salt can cause cosmetic discoloration. That is different from rust, which is described as extremely rare for this knife. For more detail, see ACUTO knives care.

If you are building out a full lineup beyond a small serrated knife, it can help to compare this to other shapes and blade lengths across Misen’s kitchen knives. This serrated option is purpose-built for foods that tend to crush or slip, so it can be a smart complement to a primary chef’s knife rather than a replacement.

Explore Single Knives for more verified options related to this product.

Frequently Asked Questions About ACUTO440 Serrated Knives

What foods is this 5-inch serrated knife best for?

It is designed to slice through crusty, soft, and or squishy foods without tearing. The page specifically highlights bread and tomatoes, and the wave-shaped serrations are meant to glide through delicate surfaces that can get crushed by a straight edge.

What does “rust-proof” mean for this knife?

This knife is made with next-generation ACUTO440 steel, and its rust resistance is lab-tested. The product page states it is proven to withstand 50 days submerged in water and up to 100 dishwasher cycles, which supports everyday use in wet kitchen conditions.

If it can handle dishwasher cycles, why does the care guidance say to hand wash?

The page notes it can withstand up to 100 dishwasher cycles in testing, but the recommended routine is still to hand wash and dry immediately after use. Following the stated care steps helps keep the knife in its best condition over time.

Is discoloration the same thing as rust?

No. The page explains that high-carbon knives may show discoloration after exposure to acidic foods and or salt, and that this is purely cosmetic. It also clarifies that discoloration is different from rust, which is described as extremely rare for this knife.

How often should this knife be sharpened?

The recommended sharpening interval on the page is every 4 to 6 months. Sticking to that schedule, along with hand washing and drying immediately after use, aligns with the product’s stated use and care guidance.