Flex is the specification, and it is chosen by the job · review
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.
What we would actually buy Bought for the handle. On a knife used on wet fish, that is the correct reason.
A 15 cm (5.9 in) straight, narrow, flexible blade with Victorinox’s Fibrox handle.
This is the knife where grip matters most: hands covered in fish or chicken, a flexible blade under pressure, and a bone underneath. Fibrox is textured molded plastic, it holds when wet, and it is the reason these knives are everywhere in professional kitchens.
Narrow and flexible, which lets the blade run along a ribcage and lift a fillet whole. It is not the knife for driving between joints — that wants stiffness.
Steel and hardness. Expect the softer European behavior: quick to sharpen, needing it often, and forgiving when it meets a bone.
On sale at around $39 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 | 15 cm (5.9 in) |
|---|---|
| Shape | Straight, narrow, flexible |
| Handle | Fibrox, non-slip, ergonomic |
| Use | Fine portioning of fish and poultry |
| Amazon reference | B0F9MH5225 |
| EAN | 7611160296627 |
A listing is not an offer: the reference exists on these stores, availability changes daily.
Straight and flexible suits filleting along a ribcage; curved suits following the contour of a joint. For fish specifically, straight and flexible is the classic.
Victorinox’s textured molded handle material. It is not beautiful and it holds when wet and greasy, which is why professional kitchens standardize on it.
7.8/ 10
Bought for the handle. On a knife used on wet fish, that is the correct reason.
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 |
|---|---|---|
| Victorinox Fibrox 15 cm (5.9 in) flexible | $39 | 15 cm (5.9 in) |
| SANMEIHO 18 cm (7.1 in) powder steel fillet knife | $50 | 18 cm (7.1 in) |
| F. Dick ErgoGrip 15 cm (5.9 in) flexible boning knife | $23 | 15 cm (5.9 in) |
| HOSHANHO 18 cm (7.1 in) 10Cr high-carbon | $66 | 18 cm (7.1 in) |
Filleting fish and jointing poultry, with wet hands.
Amazon reports what buyers took in the month before this page was last checked: at least 100.
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
18 cm (7.1 in) · high-carbon 10Cr stainless · thin blade · ergonomic handle · fish and boning
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.
Best for: Someone who fillets fish regularly and wants a harder edge than a European blade.
≈ $66
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
