In Minecraft, a 2x2 piston door is a type of door that is opened and closed by two pistons. This type of door is useful for keeping mobs and players out of your home or base.

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The 2x2 piston door is probably the most popular piston door design in Minecraft. Not only does it look cooler than the 1x2, but it isn't that much more complex than the original 1x2 design.