Hitachi High Performance EDM Wire is made by Hitachi Metals in Japan. As a manufacturer of premium brass EDM wires, Hitachi is one of the most well-known names in the EDM industry. Hitachi's reputation is based on a level of consistency and quality in its product line and is unmatched by other brands in the industry. Only pristine virgin raw materials are used in the manufacturing of Hitachi Brass wire. It has virtually no paraffin which helps it to run very clean and without causing any brass build-up in a Wire Machine's guide system. The use of natural diamond dies in the final drawing steps of the manufacturing process leads to a superior, extremely consistent and smooth wire surface. Hitachi EDM Wire is made with a CuZn40 (60% copper, 40% zinc) brass alloy which, due to its higher zinc content, allows for faster cutting speed than brass wires made with a CuZn37 or CuZn35 alloy. Hitachi Metals has a fully vertically integrated manufacturing line where casting, drawing, spooling and packaging of the product are all done internally guaranteeing the highest quality control and consistency.