The products of this heading are usually in the form of plates, sticks, tips, rods, pellets, rings, etc., and are characterised by great hardness, even when hot, and great rigidity.
In view of their special properties these plates, tips, etc., are welded, brazed or clamped on to lathe tools, milling tools, drills, dies, or other high-speed cutting tools used for working metals or other hard materials. They fall in this heading whether sharpened or not, or otherwise prepared, but not if already mounted on tools; in the latter case they fall in the headings for tools, particularly heading 82.07. The heading also excludes :(a) Unmixed, non-sintered metal carbides (heading 28.49). (b) Prepared but non-sintered metal carbide mixtures (heading 38.24). (c) Ceramic plates, sticks, tips and the like, for tools (heading 69.09). (d) Sand blast nozzles and other abrasion resistant parts of machines, of cermets (Chapter 84).
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