CNC-Tool offers only the highest quality German made solid carbide indexable Carbide insert knives. Manufactured to exacting ISO standards, these inserts offer outstanding wear resistance for optimum tool life. Standard sizes are listed below, custom sizes available upon request. Indexable insert knives are offered in dozens of standard sizes with two or four wear edges - many sizes are specifically designed for surfacing / planing heads, groovers, helical heads, spoil board cutters and moulder tooling. We offer the worlds leading manufactures of tungsten carbide. TIGRA and Grasche offers the highest quality tungsten, carbide, PCD, PcBN, CVD, and HSS products.