For years , knife makers have been trying to achieve the ultimate cutting edge , which is rated using a Rockwell hardness scale . However , the brittleness of the knife has made this impossible to produce commercially without using a Damascus method , which is very expensive . I . O . Shen have overcome this problem by sandwiching two softer outer layers ( Rockwell 10 °) of steel with Rockwell 62 ° to produce the ultimate cutting edge . I . O . Shen call this Triplex Steel Technology .

All the knives in the I . O . Shen range have used the very latest technology to construct a blade that is not only amazingly sharp but will also retain their edge for a phenomenal amount of time . They have been hand sharpened to a 15 ° angle , which allows for wonderful slicing and portion control .

Based in Solingen , Germany , Zwilling J . A . Henckels have been producing the highest quality knives for over 275 years . Famed and desired among professionals and hobby chefs worldwide , Henckels are restless innovators and tireless perfectionists . The Henckels message is always the same – ‘ no compromise ’.

Up to 40 manufacturing steps are taken to produce a top quality Henckels knife , from the ice-hardening process the steel undergoes , through to the precision laser-testing of each blade . In a world of automation and robotics , the Henckels factory is a remarkably human place .

Made at metal manufacturing company Yoshikin , Global knives are created from the finest high carbon stainless steel available for producing professional quality kitchen knives . Yoshikin uses its own proprietary stainless steel called CROMOVA 18 and this material has been designed exclusively for Global . The steel is hard enough for Global knives to keep their edge for a long time , but still soft enough so it ’ s not too difficult to sharpen them . The CRO in CROMOVA 18 stands for chromium , and the 18 is the percentage of chromium in the steel . This high percentage contributes to Global ’ s excellent stain resistance . The MO and VA stand for molybdenum and vanadium – two metallic elements that give a knife good edge retention .

GrooveTech knives have a patented technology that uniquely creates airflow between each groove on the knife . The straight edge blade has a new evolution natural non-stick contact area creating a professional feel for all uses making cutting easier . GrooveTech can be sharpened on all kinds of sharpeners and come complete with a safety storage cover .