Ryda - ST650 Santoku Knife

The steel itself is a work of art, characterized by its unique pattern on the blade, enveloping our proprietary ST650 powdered steel. By heating the Damascus blade, we’ve altered the layers of steel in the knife, revealing a stunning pattern. The core steel at the center of the blade maintains world-class quality and achieved a result of 820 when tested on the Catra (catra.org laboratory for steel sharpness testing). We have chosen a 15° blade edge angle to facilitate easy blade resharpening as needed. The hardness of our blades ranges from 62-63 HRC, making them among the hardest blades on the market. Furthermore, they are Cryo-hardened, one of the most expensive and effective processes for maintaining a knife’s high hardness, ensuring exceptional durability.

The handle is crafted from French olive wood that has been meticulously dried, moisturized, dried, and moisturized again until it attains the desired hardness. It ages beautifully over time, in contrast to pakka and micarta wood.

Designed for fluidity and control, the ST650 Santoku is a blade born from harmony—between steel and wood, sharpness and soul. With a core of ST650 powder steel, wrapped in 73 layers of Damascus and cryo-hardened to 63 HRC, it offers a silky, exacting cut through everything from root vegetables to raw fish.

Its shorter, balanced form invites an intuitive grip, guided by the warmth of hand-shaped French olive wood. Light in hand, heavy with intention.

For chefs who move with instinct. For kitchens that breathe tradition.