Glestain W Series 8.3 in. (210mm) Flexible Fillet Knife

Precision Filleting for High-Volume Professional Kitchens

The Glestain W Series 8.3 in. (210mm) Flexible Fillet Knife (021WK) is a specialized instrument engineered for the chef who demands surgical agility without compromising on blade durability. While many Japanese fillet knives are restricted to specific niche tasks, the 021WK is designed as a versatile workhorse for the protein station.

Constructed from Acuto 440 high-carbon stainless steel and hardened to 58/59 HRC, this blade offers a unique metallurgical sweet spot: it maintains a razor-sharp edge through hundreds of pounds of product but remains far more resilient and easier to maintain than brittle high-carbon steels or softer Western alternatives. The wider blade profile, compared to ultra-slender sole knives, provides the necessary backbone to glide through the silver skin of subprimals or the dense scales of larger round fish like salmon and snapper.

The hallmark of the Glestain is its asymmetrical compound grind. This engineering choice reduces surface tension, allowing the blade to move with minimal resistance. When combined with the high-quality pakkawood handle—which provides a secure, water-resistant grip during a 12-hour shift—the 021WK becomes an extension of the hand, reducing fatigue during repetitive prep work. Whether you are navigating the intricate skeletal structure of a flatfish or performing precision trimming on beef tenderloins, this knife delivers the tactile feedback and consistent performance required by elite culinary professionals.

As a part of the W series, this blade has a clean face - it doesn't feature the dimples that are used on many Glestain models. This keeps the blade as thin as possible without compromising strength or durability. You can also sharpen this knife until it becomes a toothpick (as we often do with our most beloved fillet knives).