We refined the geometry and structure of the Nitro Blade burr to get the grind performance we were looking for and the particle distribution which worked best with brewing fresh ground specialty arabica beans. Manufacturing a Nitro Blade is a serious engineering task that requires special tools and machinery, excellent craftsmanship, and lots of experience. High-nitrogen martensitic steel is extremely difficult to work with. But when finished, it is tough, highly wear-resistant, and has a high degree of edge retention. This is what we want.