"These coins are said to have special effects on those who carry them. This one makes your body feel tougher."
The Iron Defense Coin (鉄壁のコイン teppeki no koin ) is an item in Resident Evil 7: Biohazard.
It only appears in Madhouse difficulty.
Similar to the Defense Coin, it has a passive effect and needs to be put in the player's inventory for it to work. The Iron Defense Coin, however is more effective in terms of increasing defense. The player can stack it along with the Defense Coin.
The Iron Defense Coin is located in a bird cage in a room after unlocking it with the Ox Statuette. Ethan needs to insert 7 Antique Coins in order to acquire it.