Flex is the specification, and it is chosen by the job · review
An 18 cm (7.1 in) fillet and boning knife in high-carbon 10Cr stainless, with a thin blade and a handle shaped to reduce fatigue over a long job.
What we would actually buy A harder steel than the European knives in this hub. The unstated flex is the gap, because it is what separates the two jobs the knife is sold for.
An 18 cm (7.1 in) fillet and boning knife in high-carbon 10Cr stainless, with a thin blade and an ergonomic handle.
10Cr is a harder family than the X55 and X30 grades used by European makers. In practice that means a longer interval between sharpenings and a greater risk of chipping if the blade meets bone at speed.
The flex. A boning knife and a filleting knife are separated by exactly this property, and a listing that sells the knife for both jobs without naming it leaves the most important question open.
A ceramic rod rather than a steel if it turns out to be hard, a stone rather than a pull-through, and hand washing. Standard for any harder blade.
On sale at around $66 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on 3 September 2026. The live price is at the top of the page.
| Blade length | 18 cm (7.1 in) |
|---|---|
| Steel | High-carbon 10Cr stainless |
| Blade | Thin, stated to ease cutting and deboning |
| Handle | Ergonomic, stated to reduce fatigue |
| Use | Fish filleting and boning |
| Amazon reference | B0CKMF6GPZ |
| EAN | 0714757568477 |
A listing is not an offer: the reference exists on these stores, availability changes daily.
A flexible blade follows a fish ribcage; a stiff one drives between joints. A knife sold for both without stating which it is leaves the buyer guessing about the property that decides the purchase.
It is generally harder, which means longer edge retention and more risk of chipping. Makers usually state it around 58 to 60 HRC; this listing does not, so nothing is claimed.
7.8/ 10
A harder steel than the European knives in this hub. The unstated flex is the gap, because it is what separates the two jobs the knife is sold for.
Close prices, same category: comparable cookware and knives. We keep only the specifications all of them publish, because a column with gaps compares nothing.
| Model | Price | Blade length |
|---|---|---|
| HOSHANHO 18 cm (7.1 in) 10Cr high-carbon | $66 | 18 cm (7.1 in) |
| SANMEIHO 18 cm (7.1 in) powder steel fillet knife | $50 | 18 cm (7.1 in) |
| SHAN ZU Damascus 18 cm (7.1 in) fillet knife | $90 | 18 cm (7.1 in) |
| Victorinox Fibrox 15 cm (5.9 in) flexible | $39 | 15 cm (5.9 in) |
Someone who fillets fish regularly and wants a harder edge than a European blade.
Amazon reports what buyers took in the month before this page was last checked: at least 2,000.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for cookware and kitchen knives and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
15 cm (5.9 in) · X55CrMo14 steel · stated 56 HRC · flexible · curved blade · ErgoGrip handle
The only knife in this hub that publishes both its steel designation and its hardness: X55CrMo14 at a stated 56 HRC, flexible, with a curved blade that lengthens the cutting stroke.
Best for: Skinning, trimming sinew and separating poultry.
≈ $23
18 cm (7.1 in) · Japanese powder steel · 2.2 mm (0.09 in) blade stated · slightly curved · laser-engraved pattern
An 18 cm (7.1 in) fish fillet knife in Japanese powder steel with a stated 2.2 mm (0.09 in) blade — the only thickness figure published in this hub.
Best for: Filleting whole fish, for someone who will keep it away from bones.
≈ $50
15 cm (5.9 in) · straight flexible blade · narrow · Fibrox non-slip handle · stainless
A 15 cm (5.9 in) straight flexible blade with the Fibrox handle — the grip that professional kitchens buy Victorinox for, on the knife most likely to be used with wet hands.
Best for: Filleting fish and jointing poultry, with wet hands.
≈ $39
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
