## Common ground
All options refer to iron or non-alloy steel bars and rods used in construction, specifically for reinforcing concrete.
## Options at a glance
**7213 – Irregularly wound coils**
- **Defining trait:** Sold in loose, irregularly wound coils, typically straightened before use.
- **Typical examples:** Rebar coils delivered to job sites for on-site cutting and bending.
- **Best fit when:** The product arrives as coiled stock, not cut or shaped.
**7214 – Other hot-processed, including twisted after rolling**
- **Defining trait:** Made by hot-rolling, hot-drawing, forging, or extrusion; may be twisted post-rolling for better grip in concrete.
- **Typical examples:** Deformed (ribbed) rebar used in structural beams and slabs.
- **Best fit when:** The bar has surface deformations (ribs) or is twisted after rolling to improve bonding with concrete.
**7215 – Other bars and rods**
- **Defining trait:** Does not fall into the above categories—e.g., cold-worked, cut-to-length, or non-standard shapes.
- **Typical examples:** Cut rebar pieces, custom lengths, or bars with special finishes.
- **Best fit when:** The product is pre-cut, cold-drawn, or otherwise processed beyond basic hot-working.
## Key differences
| Feature | 7213 (Coils) | 7214 (Hot-processed + twisted) | 7215 (Other) |
|-----------------------|--------------------|-------------------------------|----------------------|
| Form | Irregular coils | Straight or twisted bars | Cut, shaped, or special |
| Surface treatment | Smooth or ribbed | Ribbed/twisted for grip | Varies |
| Processing | Hot-rolled only | Hot-processed + post-treatment| Any other method |
## How to choose
1. Is the product delivered in loose, irregular coils? → 7213
2. Does it have ribs or twists for better concrete bonding? → 7214
3. Is it cut-to-length, cold-worked, or non-standard? → 7215
## Overlaps & pitfalls
- A twisted bar in coil form could fit both 7213 and 7214; priority should be given to **surface treatment** (twisting) over form.
- "Hot-rolled" applies to both 7213 and 7214—use the additional trait (coiling vs. deformation) to distinguish.
- If unclear, define by **main function**: structural reinforcement with enhanced grip → 7214; raw material delivery → 7213