Iron Fittings is a unique technology of the Macedonian Dynasty in Age of Empires IV: Dynasties of the East. It can be researched multiple times at the Varangian Arsenal starting in the Feudal Age, and increases the hit points of all siege engines by +5%.
Tiers[]
| Tier | Minimum Age | Silver cost |
|---|---|---|
| 1st |  Feudal Age
|
225 |
| 2nd | 450 | |
| 3rd |  Castle Age
|
900 |
| 4th | 1,800 | |
| 5th |  Imperial Age
|
2,800 |
| 6th | 3,800 |
