6804.21.00 - Of agglomerated synthetic or natural diamond

This HTS category, 6804.21.00, specifically covers millstones, grindstones, grinding wheels, and similar articles that are designed for grinding, sharpening, polishing, trueing, or cutting. The defining characteristic of this classification is that these articles are made of agglomerated synthetic or natural diamond. This material composition is crucial for distinguishing these items from other abrasive tools.

It is important to differentiate this category from its siblings. While 6804.22 covers similar articles made from *other* agglomerated abrasives or ceramics, and 6804.23.00.00 pertains to those made of natural stone, this category is exclusively for diamond-based agglomerates. The underlying principle of its parent category, "Millstones, grindstones, grinding wheels and the like," remains consistent, with the focus here narrowed to the specific abrasive material used.

Within this category, further subcategories exist to refine the classification based on the specific form and construction of the diamond agglomerated articles. These include distinct classifications for segments intended for circular sawblades (6804.21.00.10), articles with continuous rim segments attached to steel plates (6804.21.00.20), articles with multiple segments but without cutting parts (6804.21.00.30), and a residual category for all other such articles (6804.21.00.90). These subdivisions help to account for the diverse applications and designs of diamond agglomerated abrasive tools.