The zip line is a block used for moving around your base faster. Zip lines can only transport you down, unlike lift lines . They do not use power.
A zip line block.
Using the zip line[]
To use a zip line, you must first link 2 zip line blocks. Make sure there are no obsticals in the way of the two blocks, or they won't link.
Jump onto the "line" that the two blocks form, and a hook will appear and carry you down. You must be hanging from the zip line.
Two linked zip line blocks.