## Common ground
All options are types of metal spikes or fasteners used for securing, anchoring, or mounting.
## Options at a glance
**7317.00 – Iron/steel spikes**
- **Defining trait:** Made primarily from iron or steel, typically used for heavy-duty anchoring (e.g., in construction or agriculture).
- **Typical examples:** Fence posts, ground anchors, agricultural stakes.
- **Best fit when:** The spike is robust, uncoated, and designed for high strength and durability.
**7415.10 – Copper-headed iron/steel fasteners**
- **Defining trait:** Features a copper head on an iron or steel shaft; used where corrosion resistance or appearance matters.
- **Typical examples:** Decorative nails, architectural fixings, antique-style fixtures.
- **Best fit when:** The spike has a visible copper cap or is used in decorative or corrosion-sensitive applications.
**7415.10 – Copper spikes**
- **Defining trait:** Entirely made of copper; valued for conductivity, corrosion resistance, and aesthetics.
- **Typical examples:** Electrical grounding rods, decorative spikes, marine hardware.
- **Best fit when:** The spike is fully copper, not just the head, and used in electrical or high-corrosion environments.
**7508.90 – Nickel spikes**
- **Defining trait:** Made of nickel, known for high corrosion resistance and strength; often used in harsh environments.
- **Typical examples:** Laboratory equipment mounts, chemical industry fasteners, aerospace components.
- **Best fit when:** The spike is exposed to extreme conditions or requires non-magnetic properties.
**7616.10 – Aluminium spikes**
- **Defining trait:** Lightweight and corrosion-resistant; ideal for applications where weight matters.
- **Typical examples:** Tent stakes, lightweight signage, outdoor gear.
- **Best fit when:** The spike is light, non-magnetic, and used in outdoor or portable setups.
**7907.00 – Zinc spikes**
- **Defining trait:** Typically galvanized (zinc-coated) iron/steel; corrosion protection is key.
- **Typical examples:** Fence posts, garden stakes, outdoor construction fasteners.
- **Best fit when:** The spike is coated or made of zinc for rust resistance, especially in outdoor use.
## Key differences
| Option | Material | Corrosion Resistance | Weight | Primary Use Case |
|-------|----------|------------------------|--------|------------------|
| 7317.00 | Iron/steel | Low (unless coated) | Heavy | General-purpose anchoring |
| 7415.10 (copper head) | Iron/steel + copper head | Medium | Medium | Decorative or mixed-use |
| 7415.10 (copper) | Copper | High | Medium | Electrical, marine |
| 7508.90 | Nickel | Very high | Medium-heavy | Harsh environments |
| 7616.10 | Aluminium | High | Light | Lightweight, outdoor |
| 7907.00 | Zinc (coated/steel) | High | Medium | Outdoor, corrosion-prone |
## How to choose
- Is the spike made entirely of copper? → 7415.10 (copper)
- Does it have a copper head on iron/steel? → 7415.10 (copper-headed)
- Is it fully nickel or used in extreme conditions? → 7508.90
- Is it lightweight and non-magnetic? → 7616.10
- Is it zinc-coated or galvanized steel? → 7907.00
- Is it plain iron/steel, heavy, and used for general anchoring? → 7317.00
## Overlaps & pitfalls
- **7415.10** appears twice: once for copper-headed iron/steel, once for solid copper. These are distinct—check if the *entire* spike is copper or just the head.
- Zinc spikes (7907.00) may be mistaken for pure zinc; clarify if it's coated steel or solid zinc.
- No priority rule given—choose based on **material composition** as the defining trait