At the heart of the Ryda collection is the ST650 series, expertly crafted with a core of ST650 powder steel and 36 layers of 316/316L stainless steel on each side. Vacuum-treated for impressive sharpness and edge retention, the blades boast a Rockwell hardness of 62-63 HRC and a refined double-beveled 15° edge—hallmarks of elite Japanese craftsmanship. The beautiful French olive wood handles, carefully dried and conditioned, deliver unmatched comfort for both left- and right-handed users.