## Common ground
All options describe thumb tacks made from different metals, used for fastening paper or lightweight materials.
## Options at a glance
**7317.00 – Iron/steel body**
- **Defining trait:** Made primarily of iron or steel, often with a plain or coated head.
- **Typical examples:** Standard office thumb tacks, metal push pins.
- **Best fit when:** The product is made of iron or steel, especially if the head is not copper.
**7415.10 – Copper head on iron/steel body**
- **Defining trait:** Features a copper head (e.g., decorative or corrosion-resistant) while the shaft is iron or steel.
- **Typical examples:** Tacks with shiny copper caps, antique-style office tacks.
- **Best fit when:** The head is visibly copper, even if the shaft is iron/steel.
**7415.10 – Copper body**
- **Defining trait:** Entirely made of copper, including both shaft and head.
- **Typical examples:** Decorative tacks, artistic or vintage office pins.
- **Best fit when:** The entire tack is visibly copper, not just the head.
**7508.90 – Nickel body**
- **Defining trait:** Made of nickel, often for corrosion resistance or a shiny finish.
- **Typical examples:** High-end or industrial tacks with a silver-white appearance.
- **Best fit when:** The material is clearly nickel (e.g., tested or known to be non-magnetic).
**7616.10 – Aluminium body**
- **Defining trait:** Made of aluminium, lightweight and non-corrosive.
- **Typical examples:** Lightweight office tacks, outdoor or moisture-prone use.
- **Best fit when:** The tack is light in weight and has a silvery, non-magnetic appearance.
**7907.00 – Zinc body**
- **Defining trait:** Made of zinc, often used for plating or low-cost tacks.
- **Typical examples:** Coated tacks, cheap office pins, galvanized types.
- **Best fit when:** The tack is dull gray, may show signs of corrosion, or feels heavier than aluminium.
## Key differences
| Option | Material | Head material | Weight | Corrosion resistance |
|-------|----------|----------------|--------|------------------------|
| 7317.00 | Iron/steel | Usually same | Medium | Low (rusts) |
| 7415.10 (copper head) | Iron/steel | Copper | Medium | Moderate |
| 7415.10 (copper body) | Copper | Copper | Light | High |
| 7508.90 | Nickel | Nickel | Medium | Very high |
| 7616.10 | Aluminium | Aluminium | Light | High |
| 7907.00 | Zinc | Zinc | Medium-heavy | Moderate |
## How to choose
- Is the entire tack made of copper? → 7415.10 (copper body)
- Does it have a copper head but iron/steel shaft? → 7415.10 (copper head on iron/steel)
- Is it made of iron or steel with no copper? → 7317.00
- Is it shiny silver-white and non-magnetic? → 7616.10 (aluminium) or 7508.90 (nickel)
- Does it feel heavy, dull gray, and may rust? → 7907.00 (zinc)
## Overlaps & pitfalls
- **Overlap:** A tack with a copper head on an iron/steel shaft fits both 7415.10 codes—choose based on which part defines the product (head vs. body).
- **Pitfall:** "Copper" and "nickel" tacks may look similar; use material testing or known composition.
- **Unclear priority:** If both head and body are different metals, the **main function or defining feature** should guide classification—e.g., if it's decorative, copper body may take precedence