In Minecraft, a door with iron bars is a type of door that allows players to see through it while keeping mobs out. It is crafted using six iron bars and two wooden planks. To craft an iron door, players must place the iron bars in the top and bottom rows of a 3×3 crafting grid and place the wooden planks in the middle row. Once crafted, the door can be placed in a doorway by right-clicking on the door frame.
Iron doors are more durable than wooden doors and can withstand more attacks from mobs. They are also fire-resistant, making them ideal for use in areas where there is a risk of fire. Iron doors can be opened and closed by right-clicking on them. They can also be locked with a key to prevent unauthorized access.