Kaizen X No Joke Knives (Set x4)Bringing together the exceptional craftsmanship of Jack (No Joke Knives) and the Kaizen vision, offering you the opportunity to own 4 crafted knives for all your culinary needs. All knives are made with 100 layers hollowed ground. Using British EN42 steel and 15N20 Nickel. Hardened and tempered for versatility. With a hardness rating between 60 and 62 HRC. Bog Oak handles sourced from the Fenlands in Norfolk carbon dated over 5000 years old. Blade