## Common ground
All options refer to metal fasteners or small metal items, specifically dog spikes—small, pointed metal devices used to prevent dogs from walking on certain surfaces.
## Options at a glance
**7317.00 – Iron or steel**
- **Defining trait:** Made primarily of iron or steel, the most common and cost-effective base material.
- **Typical examples:** Standard metal spikes for sidewalks, garden paths.
- **Best fit when:** The spike is plain, heavy-duty, and made from uncoated or basic steel.
**7415.10 – Copper**
- **Defining trait:** Made entirely of copper, known for corrosion resistance and aesthetic appeal.
- **Typical examples:** Decorative spikes on historic walkways, garden art.
- **Best fit when:** The spike is visibly copper-colored and used in ornamental or high-end settings.
**7415.10 – Copper-headed steel**
- **Defining trait:** Steel shaft with a copper head—hybrid construction for durability and appearance.
- **Typical examples:** Spikes with shiny copper caps, often used in public parks.
- **Best fit when:** The spike has a distinct copper cap or head on a steel body.
**7508.90 – Nickel**
- **Defining trait:** Made of nickel, valued for strength and resistance to tarnish.
- **Typical examples:** High-end spikes in marine or industrial environments.
- **Best fit when:** The spike is highly resistant to corrosion and has a silvery-white finish.
**7616.10 – Aluminium**
- **Defining trait:** Lightweight and rust-resistant, ideal for outdoor use without weight burden.
- **Typical examples:** Spikes on light-duty pathways or temporary installations.
- **Best fit when:** The spike is lightweight and non-magnetic, often used in sensitive areas.
**7907.00 – Zinc**
- **Defining trait:** Made of zinc, typically used for galvanization or in sacrificial coatings.
- **Typical examples:** Coated spikes to prevent rust; less common as primary material.
- **Best fit when:** The spike is coated or made from zinc-plated steel (but not pure zinc).
## Key differences
| Option | Material | Head Type | Weight | Corrosion Resistance |
|--------|----------|-----------|--------|------------------------|
| 7317.00 | Iron/Steel | None | Heavy | Low (unless coated) |
| 7415.10 (copper) | Copper | N/A | Medium | High |
| 7415.10 (copper head) | Steel shaft, copper head | Copper cap | Medium | Medium-High |
| 7508.90 | Nickel | N/A | Medium | Very High |
| 7616.10 | Aluminium | N/A | Light | High |
| 7907.00 | Zinc | N/A | Light | Moderate (if pure) |
## How to choose
- Is the spike made of steel or iron? → 7317.00
- Is it solid copper, not just coated? → 7415.10 (copper)
- Does it have a copper cap on a steel shaft? → 7415.10 (copper-headed steel)
- Is it silvery-white and highly resistant to rust? → 7508.90
- Is it lightweight and non-magnetic? → 7616.10
- Is it coated or made of zinc, possibly with a dull finish? → 7907.00
## Overlaps & pitfalls
- **Overlaps:** A copper-headed steel spike (7415.10) could be mistaken for solid copper if not inspected closely. Zinc-coated steel spikes may be misclassified as pure zinc.
- **Pitfall:** "Copper" vs. "copper-headed" are distinct—check head composition. If material is unclear, prioritize the main body (e.g., steel shaft = 7317.00).
- **No priority rule given**—choose based on the product’s MAIN material or defining feature