Piston

Pistons are minecraft blocks that can double in length to

push other blocks in the way they are facing. They can be

made with one redstone dust, one iron ingot, four cobblestone

and three wooden planks. Their twin the sticky Piston can

stick blocks on the platform that pushes out to move

blocks back also, making them much more useful with

doorways and traps. Pistons are useful in the Tekkit mod

being used in contraptions and ingredients for machines.