A set of assorted tableware items — including butter knives — is classified as a whole under heading 8215 when the set is put up for retail sale together. Butter knives are specifically named in the heading description, and the set classification rule keeps the entire assortment here rather than splitting individual pieces to other headings.

Plating with silver, gold, or other precious metals triggers the plated subheadings (821510 and 821591). Stainless steel, chrome-plated, or other non-precious-metal finishes fall under the unplated subheadings (821520 and 821599), even if the finish is decorative or corrosion-resistant.