## Common ground
All options are crochet hooks made from metal, used for knitting yarn into fabric.
## Options at a glance
**7319.90 – Iron or steel**
- **Defining trait:** Made from ferrous metal, typically heavier and more durable.
- **Typical examples:** Standard-sized steel crochet hooks, industrial-grade hooks.
- **Best fit when:** You need strength, longevity, or a firm grip for thick yarns.
**7616.99 – Aluminium**
- **Defining trait:** Made from lightweight, non-corrosive aluminum alloy.
- **Typical examples:** Lightweight hobbyist hooks, travel-friendly models.
- **Best fit when:** You prefer low weight, smooth handling, or resistance to rust.
## Key differences
| Feature | 7319.90 (Iron/Steel) | 7616.99 (Aluminium) |
|------------------|------------------------|-----------------------|
| Weight | Heavy | Light |
| Corrosion | Prone to rust | Resists rust |
| Durability | High | Moderate |
| Grip & Feel | Firm, solid | Smooth, light |
## How to choose
- Is the hook heavy and made of steel or iron? → 7319.90
- Is it lightweight and shiny, likely aluminum? → 7616.99
## Overlaps & pitfalls
A crochet hook might be coated (e.g., with plastic) but still fall under one metal category based on core material. No clear overlap in classification—material type is the primary differentiator. If unsure, check for rust or weight: steel hooks are heavier and may rust; aluminum ones are lighter and shiny. The main function (crocheting) doesn’t change the classification—material does