KastKing Flexible Serrated Fillet Knife, 9-Inch

Last updated date: August 2, 2022

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KastKing Flexible Serrated Fillet Knife, 9-Inch

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We looked at the top Fillet Knives and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Fillet Knife you should buy.

Update as August 2, 2022:
Checkout The Best Fillet Knife for a detailed review of all the top fillet knives.

Overall Take

This fillet knife is crafted with a sharp stainless-steel blade, and has a polymer grip non-slip handle for safety and comfort. The blade of the knife has a unique black finish, and comes with an open-slot sheath. However, it does not include a sharpener.

In our analysis of 128 expert reviews, the KastKing Flexible Serrated Fillet Knife, 9-Inch placed 8th when we looked at the top 14 products in the category. For the full ranking, see below.

From The Manufacturer

KastKing fillet knife 11 1 5” Versatile Knife – Fixed Blade The 5” versatile fixed-blade outdoor knife is stiff and strong, it has a serrated top edge that makes cutting frozen bait or wood quick and easy. The razor-sharp leading edge allows the fisherman to easily prepare both chunk and cut plug style baits. 1 5” Versatile Knife 11 6”, 7” & 9” Fillet Knives 1 9″ Strong Fillet Knife 1 12” Slicing Knife 1 6”, 7” & 9” Fillet Knives – Flexible Blade The Razor Sharp, Flexible and Curved Blade for perfect filleting fish, boning meet and processing any food . All These KastKing professional level knives will provide years of service and will quickly become your favorite tools. 11 Why KastKing knives are worth having? Razor Sharp Black, G4116 German Stainless Steel blades are razor sharp and maintain their edge for easy boning and filleting. Good Value 1.Includes a durable knife sheath to keep your blade safe and ready to go to work. 2.G4116 German Stainless Steel blades . 3.We use the most comfortable and slip-resistant, Super-Polymer grips for your safety and comfort. Professional Level Knives All These KastKing professional level knives will provide years of service and will quickly become your favorite tool for filleting fish, boning meet and processing any food. Razor Sharp German Stainless Blades Non-Slip Super Polymer Grip – comfortable to hold Includes Protective Knife Sheath Affordable Innovation 1 1 3 1 1 Click here for details Click here for details Click here for details Click here for details Click here for details Essential gear for angler Fillet knife sharpener Fishing pliers Fishing Braid Line Scissors Fishing scale Tackle Bags

Expert Reviews

Expert Summarized Score

17 expert reviews

User Summarized Score

444 user reviews

What experts liked

The blade itself is razor-sharp with awe-inspiring edge retention and quality G4116 German stainless steel. To keep your knife sharp and safe, a sheath with slots is provided, which stays snug on the knife, making it suitable for taking on camping or fishing trips.
- Daring Kitchen
Crafted with a razor sharp stainless steel blade, this professional knife can be used for filleting and boning with no restrictions or limitations to speak of. At the same time, the knife benefits from a non-slip handle and an included protective sheath for good measure.
- Noble Rate
KastKing fillet knives feature blades that are extremely sharp, durable, and flexible, making them ideal as a high use fillet knife for anglers.
- Amazing Outdoor Adventures
The beautiful black finish enhances the appearance while at the same time ensuring that the product is resistant to corrosion and rust.The super polymer grip is non-slip thereby providing users with a firm and secure grip when filleting meat.
- Knives Sensei
This model is made with a slip-resistant super polymer grip and a 9-inch blade made from German stainless steel that will slice through just about anything.
- Savant Magazine
The handle is special. First and most importantly, the handle is comfortable to hold. It is very easy to clean, and it offers an immense level of grip. All of that we like, and we pay close attention to each factor.
- Knife Guides
This Fillet Knife consists of a razor-sharp high quality german stainless steel blade. Its high precision blade helps us to fillet fish with its optimum sharpness and naturally slides through the flesh making it easier for us to fillet the fish.
- My Cooking Town
The no-slip polymer grip handle will keep the knife in precision cutting mode even when the fish slime tries to do it’s thing. In addition to not slipping, it’s going to remain comfortable in those situations where you have lots of catfish to fillet..and let's be honest...
- Fishing Skillz
The blade comes razor sharp, making it one of the sharpest fillet knives on the market. The edge is easy to maintain and the stainless steel material ensures durability. The G4116 German stainless steel is also stylishly designed and comes with a black finish, giving it a catchy look.
- KayakFisherly
Each blade comes equipped with a non-slip polymer grip and a lockable sheath.
- Global Fishing Reports
The knife is comfortable to hold while working or not. It is slip resistant which allows for a Super firm grip to ease your work and helps you to be comfortable while working.
- Top10den
The 6”, 7”, and 9” blades are all very flexible, razor sharp and have curved blades that are prefect for filleting fish, processing any food and deboning the fish. All of these incredible knives by KastKing will give you years of great fishing trips and service. This knife might end up being one of your best friends.
- Stats Pros
I find the look of this blade is quite amazing. That black G 4116 German stainless steel with orange handle looks so cool and futuristic. And don’t let the look deceive you. This knife can keep on going for a long time without losing its edge.
- Top Review Geek
All models come with a grippy polymer handle and a sheath that prevents moisture from building up on the blade.
- Camperville
KastKing fillet knives characteristic blades which are extraordinarily sharp, sturdy, and versatile, making them best as a excessive use fillet knife for anglers.
- Survival Skillz

What experts didn't like

However, it is available only in orange color, which may be an issue for some of you.
- Knife Guides
Although being made up of non-sticky polymer handle, while becoming wet it can sometimes slip away.
- My Cooking Town
Does not come with a sharpener.
- KayakFisherly
Doesn’t feature a safety lock.
- Top10den
Needs frequent sharpening.
- Top Review Geek

Our Expert Consultant

Julie Chernoff
Culinary Expert

Julie Chernoff is a long-time member of Les Dames d’Escoffier (past president of the Chicago Chapter, and current co-chair of the LDEI Legacy Awards Committee), the Association of Food Journalists (AFJ) and the International Association of Culinary Professionals.

Chernoff is the dining editor of Better, a lifestyle website and print magazine. Her journalism started in the test kitchens of Weight Watchers Magazine. She holds a BA in English from Yale University and is a graduate of the California Culinary Academy. She has spent the last few decades styling, photographing, teaching, developing recipes, editing, thinking and writing about food.

An Overview On Fillet Knives

Whether you enjoy catching your own fish, or purchasing whole fish from the fishmonger at the local market, a fillet knife is a useful tool to have. When you want to expertly clean and debone your fish, a sharp, exact fillet knife is a great way to make safe and accurate cuts. You don’t need to be a professional chef or a fish connoisseur to use a fillet knife either, as it’s a great tool for home cooks and professionals alike.

Simplemost Media

“A good fillet knife can be used for skinning, deboning and filleting fish,” says our culinary expert Julie Chernoff. “If you can find a fillet knife that does all three, then you’re in good shape.”

One of the specific characteristics of a fillet knife is that the blade is flexible, unlike other kitchen knives. This flexibility of the blade enables cooks to have greater control over their cuts, so that no edible parts of the fish are wasted. The flexible blade can maneuver around hard surfaces, such as bones or scales, to remove the pieces of desired flesh.

What makes a fillet knife blade so flexible? It’s all in the design. It is often made out of special steel that allows for that unique flexibility. Plus, the blades are long, usually between seven to nine inches. The thickness and width of the blade also affect the amount of flexibility in the blade. When searching for a good fillet knife, be sure to check how flexible the blade is.

“Look for a full-tang, riveted-handle knife for stability,” says Chernoff. “The blade should have a substantial shoulder where it connects to the handle for added protection from the slippery fish and to have something to brace your hand against to keep it from coming in contact with the blade.”

Simplemost Media

In order to expertly fillet a fish, begin by removing the scales of the fish with the backside of the blade. You can then remove the fins and take off all of the skin. Next, take out the entrails of the fish with the fillet knife. Be sure to wash out the space inside with water.

After that, slice the fish fully open lengthwise. You can use your fillet knife to mark the fillets on either side. Using the flexible blade of the fillet knife, take out the fillets very carefully so as not to tear them. This technique can be used on most types of fish. Remember to always use a sharp and flexible fillet knife to make exact cuts.

The Fillet Knife Buying Guide

  • One of the most important elements to look for when selecting a good fillet knife is the material the knife is made out of. You want to ensure that the blade will be strong, yet forgiving. A fillet knife blade needs to be flexible but firm at the same time, allowing you to make expert cuts and remove the flesh of the fish. Some knives are made out of an incredibly razor-sharp imported high-carbon German steel and feature a hand polished edge at 14-16 degrees per side. This makes the knife highly flexible and  maneuverable. Other knives are forged from a single block of high carbon stainless steel. They are then tempered to 58-degree HRC. Their blades are long and narrow, so that they are easy to move it along the backbone of the fish and remove the scales. Some knives are comprised of premium, razor-sharp G4116 German stainless steel. Their blades are curved and have the right flexibility to cut around the natural shape of fish.
  • Just as important as the blade is the handle. After all, it doesn’t matter how flexible or sharp the blade is if the handle of the knife is difficult to hold. You want to ensure the handle provides the perfect grip for your hand, so that the blade is easy to control and maneuver. Look for a knife that has a luxury imported black pakkawood handle. These handles are triple-riveted, so that they provide a strong grip with comfort. You also want the knife to have an ergonomic handle. Some models have a comfortable and slip-resistant handle, with polymer grips. They are designed to ensure you always have a solid grip on the knife.
  • When you have such a sharp tool in the kitchen, it’s important to keep safety in mind, especially for storage. Opt for a knife that has a protective sheath. This not only keeps the blade safe while it’s not in use, it also ensures that you don’t accidentally cut your fingers while the knife is not in use. Some knives come with a durable and lightweight sheath, designed to lock the handle for safety. The sheath has open slots that enable any water on the knife to drain, ensuring the knife stays dry and sharp.