Pistons are redstone-activated tools that push blocks in their line of direction. They can be used to make piston doors, traps and more.
When a redstone current is applied, it expands to take up two blocks in a single direction pushing blocks out of the way. Blocks that are not pushable include bedrock, extended pistons, portal stone. and portal frame. It is only able to push seven blocks.
- 1.28: If a piston on its side is powered by a pressure plate directly on top of the piston, then the piston will repeatedly fire in a random pattern