• Gyuto 220mm RWL34 S-Grind Integral
  • Gyuto 220mm RWL34 S-Grind Integral – detail view
  • Gyuto 220mm RWL34 S-Grind Integral – side profile
  • Gyuto 220mm RWL34 S-Grind Integral – handle detail
  • Gyuto 220mm RWL34 S-Grind Integral – blade close-up
  • Gyuto 220mm RWL34 S-Grind Integral – view 6
  • Gyuto 220mm RWL34 S-Grind Integral – view 7
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Gyuto 220mm RWL34 S-Grind Integral

Gyuto 220mm RWL34 S-Grind Integral

By Jeroen Knippenberg

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Jeroen Knippenberg

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Handmade by Dutch bladesmith Jeroen Knippenberg, this 220 mm Gyuto is a striking example of performance-driven craftsmanship—clean in design, highly refined in execution, and built for serious kitchen use. Combining bold integral construction with a finely tuned S-grind, it delivers an exceptional mix of cutting power, precision, and smooth food release. The profile feels authoritative on the board, yet agile through the tip, making it equally capable for everyday prep, fine slicing, and more delicate detail work.

Crafted from mono steel RWL34 stainless hardened to 61 HRC, this knife offers an excellent balance of edge retention, toughness, and corrosion resistance. It is a highly practical choice for cooks who want the feel and performance of a handmade knife without the added maintenance demands of carbon steel. The satin-polished finish enhances the clean, modern character of the piece, while the pronounced distal taper—moving from a robust 5.5 mm spine at the heel to an ultra-fine 0.63 mm near the tip—gives the blade both strength and remarkable cutting finesse.

The 60 mm blade height provides generous knuckle clearance and a confident, substantial feel in hand, while the integral construction helps create a seamless transition from blade to handle. Paired with a hidden tang and dyed, stabilised maple handle, the knife feels secure, balanced, and comfortable through extended use. Visually, the handle adds warmth and individuality to the knife’s otherwise restrained and contemporary aesthetic.

This is a versatile, high-performance Gyuto for those who value handmade quality, stainless practicality, and cutting geometry designed to perform at a very high level.

Product Specification
  • Blade Type:
  • Overall Length: 355mm
  • Edge Length: 220mm
  • Spine Heel: 5.5mm
  • Spine Mid: 2.9mm
  • Spine Tip (20mm before): 0.63mm
  • Blade Height: 60mm
  • Weight: 255.4g
  • Cutting Edge Steel:
  • Steel class: Stainless
  • HRC: 61
  • Blade Construction:
  • Blade Finish: Satin Polish
  • Grind:
  • Handle Construction:
  • Handle Materials: Dyed, Stabilised Maple
  • Handedness: Ambidextrous

Blade type

Gyuto

牛刀

The Japanese take on the Western chef's knife, and the most versatile blade in a modern kitchen. A gyuto carries a long, gently curved edge — most often 210 to 270 mm — that allows both push cuts and a rocking motion, with a pointed tip for fine work and enough height at the heel to keep knuckles clear of the board. It handles proteins, vegetables, and herbs without complaint, which is why most cooks reach for it first.

Compared with a European chef's knife, the gyuto is usually thinner, harder, and lighter, ground to a finer edge that rewards good board technique and regular honing. That same thinness is the trade-off: the edge is less forgiving of bone, frozen food, and twisting cuts, and it asks for a little more care in maintenance in exchange for its keenness.

View full knife type guide →

Cutting edge steel

RWL34 / RWL

Powder metallurgy martensitic stainless tool steel

Typical HRC
60–63
Corrosion class
Stainless
Production
Powder
Origin
Sweden (Damasteel)

RWL34 — usually shortened to RWL — is Damasteel's powder-route stainless equivalent of ATS-34 / CPM-154, and is the bright-and-hard layer in much of the world's high-end stainless damascus. The composition (1.05 percent carbon, 14 percent chromium, 4 percent molybdenum, 0.2 percent vanadium) is essentially ATS-34 chemistry, but the rapid-solidification powder process produces a finer, cleaner microstructure than the conventional ingot route.

In a kitchen knife — usually a Damasteel-pattern blade — RWL34 runs at 60–62 HRC, sharpens cleanly, and produces a refined edge that holds well for the class. Edge retention is in the same band as SG2 at slightly lower hardness; toughness is good; corrosion resistance is excellent. The named association with Robert W. Loveless, the steel's original collaborator on the design, is half of the steel's mystique.

You see RWL most often as a mono-steel core in high-end custom work and as the contrast layer in Damasteel patterns. Among the makers Modern Cooking carries, Bernhard Noitz, Erik Gullikson, Evan Antzenberger, Jeroen Knippenberg, and Birch & Bevel work in RWL. It is a genuinely nice premium stainless that is somewhat under-discussed compared to the American powder steels.

View full steel guide →

Blade construction

Mono Steel

A knife forged from a single piece of steel — no laminations, no clad layers. The simplest and most direct construction. The entire blade is the cutting steel, with no softer outer jacket to protect or contrast it. Most contemporary Western kitchen knives in carbon and stainless steel are mono-steel constructions, as are honyaki and most European bladesmith work.

The trade-off is straightforward: mono-steel knives are easier to forge, sharpen, and reason about, but the entire blade carries the cutting steel's properties — including its reactivity if it's a clean carbon. There is no soft jacket to protect a more brittle core from impact, so the heat treatment and geometry have to do all the work.

View full construction guide →

Grind

Compound Grind

A category covering blades ground with more than one geometry stacked into a single cross-section — typically a convex (or flat) primary bevel at the very edge, with one or more hollows ground higher up the blade face to relieve material behind it. The aim is food release and reduced wedging: the hollow opens an air gap so dense produce breaks away from the blade instead of clinging to it, while the convex steel at the edge keeps the apex strong and the knife driving through the cut.

The named variations in the Modern Cooking catalogue differ in where the hollows sit, how many there are, and whether the two faces are ground alike:

S-Grind — a convex primary bevel at the edge with a hollow ground into both faces just above it. The symmetrical "S"-shaped cross-section is the classic food-release grind: relief above the edge, strength at the edge.

C-Grind — an asymmetric S-grind. Both faces keep the convex primary bevel, but only one face carries the hollow above it. The single-sided relief biases food release to one side, and is simpler to grind and to maintain than a full S.

B-Grind — a stacked twin-hollow grind: a tight, narrow hollow immediately above the edge, with a second, broader and wider hollow above that. The staged relief gives especially strong food release across the height of the blade.

S-Hook Grind — also called a hook, harpoon, or J grind. An S-grind taken to an extreme, with the hollow placed very close to the cutting edge. The aggressive near-edge relief gives outstanding food release, at the price of being the most maintenance-sensitive of the family.

Asymmetrical-B Grind — a B-grind in which the twin-hollow structure is carried on one face while the other is ground differently (or left without the upper hollow), off-setting the edge. It combines the staged food release of a B-grind with the handed, steering character of an asymmetric grind.

In every case the gain is food release and reduced drag, and the shared cost is sharpening: as the edge is thinned over the knife's life, maintenance eventually reaches the hollowed steel, which cannot be flattened on a stone the way a convex or flat bevel can. How soon that happens depends on how deeply the hollows are cut and how close to the edge they sit — exactly what separates a gentle S-grind from an aggressive S-hook. These are high-craft geometries, prized by makers and experienced users for their cutting feel, and best appreciated by a cook who maintains their own edges.

View full grind guide →

Handle construction

Hidden Tang

A construction in which the tang runs into the handle but stays concealed inside it, rather than showing between two scales. A narrower tang — a full-length stick or a shorter projection — is set into a drilled or burned channel in a one-piece handle and secured with adhesive, a friction fit, or a threaded fitting drawn up against the blade. This is the traditional construction of Japanese wa-handles and many European hidden-tang knives.

The design puts the handle material in charge of the look and feel: a single piece of wood, horn, or composite — often with a ferrule or spacers at the front — is shaped into any cross-section the maker wants, from the classic octagonal and D-shaped wa profiles to fully rounded Western forms. With no steel showing along the grip, the handle can be slim and light, and is frequently made to be removed and replaced, with the balance sitting toward the blade.

View full construction guide →

Shipping & Returns

Shipping

We process orders 5 days a week (Monday - Friday) and ship from our shop in Sydney, Australia. We ship with FedEx, UPS and DHL.

We are happy to offer free international shipping on a variety of orders depending on location and order value.

Free Shipping Regions and Minimum Order Values

For Australia and New Zealand the minimum is $500AUD. For the rest of the world it is approximately €1000EUR. The discount is applied automatically when you reach the minimum cart value at checkout.

Returns

If you're not entirely happy with your purchase, you can return it within 14 days of delivery for a refund. The item must be in its original condition with all original packaging.

  • Returns are accepted for 14 days
  • The customer is responsible for return shipping costs
  • A 15% restocking fee may be applied to change-of-mind returns
  • We do not accept returns on second-hand items for change of mind

Faulty or Damaged Items

You must notify us within 5 business days of receiving your order. Photographic evidence of damage is required. Once approved, Modern Cooking will cover return shipping costs.

Product Care

Cleaning: Clean by hand with warm water. Avoid wetting the handle when possible.

Sharpening: We advise using whetstones to sharpen your knives and a honing rod or steel to maintain the burr between sharpening sessions.

Reactive Steels: Reactive steels like Aogami Super, Apex Ultra or premium reactive German and Swedish steels are susceptible to rust if not properly cared for. Keep the knife dry between uses and when storing for longer periods, wiping the blade with Tsubaki oil or another food-safe oil is a wise choice. A patina can be a beautiful personal feature on your knife and helps to stop rust forming.

Handle Care: For non-stabilised wooden handles, apply Tsubaki oil or another food-safe oil from time to time. Food-safe wax can be applied to both stabilised and non-stabilised wooden handles. Never apply hot wax or oil as you risk warping or damaging the handle.

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