Door – Minecraft Wiki

A door is a block that can be used as a barrier that can be opened by hand or with redstone. Doors can be found in any Overworld biome, and can also be crafted from any type of wood as well as materials found in the Nether. Some have built-in openings that are useful for determining the time of day. Wooden doors can be broken with anything, but axes are fastest. An iron door can be broken with anything if the top half of the door is broken. All doors drop themselves if they no longer have a bloc

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In honor of MBA: here is the Minecraft door signing FUNNY : r/zillakami