8207.70.30 - With cutting part containing by weight over 0.2 percent of chromium, molybdenum, or tungsten or over 0.1 percent of vanadium

This HTS category, 8207.70.30, specifically covers interchangeable milling tools designed for use with hand tools or machine tools. These tools are characterized by their cutting parts containing, by weight, over 0.2 percent of chromium, molybdenum, or tungsten, or over 0.1 percent of vanadium. This high-alloy content is crucial for the durability and performance of these tools in demanding milling operations.

The primary distinction of this category from its sibling, 8207.70.60 (Other milling tools), lies in the precise material composition of the cutting edge. While 8207.70.60 encompasses milling tools that do not meet the specified alloy content thresholds, 8207.70.30 is reserved for those where the presence of these specific alloying elements is a defining characteristic. This ensures that tools designed for enhanced wear resistance and high-temperature strength are correctly classified.

Within this category, further subdivisions exist to provide more granular classification. Subcategories such as 8207.70.30.30 (End milling cutters) and 8207.70.30.40 (Router bits for woodworking) address specific types of milling tools based on their form and primary application. The existence of these subcategories allows for precise identification of specialized milling tools, facilitating accurate trade data collection and tariff application.