Old early access stairs. Useful for building stairs in a single foundation, allowing for an easy upgrade to an elevator later.

These were "removed" in 1.0, but only from the Awesome Shop. They can still be built if you have an early access save which used them, or if you have a blueprint created with an early access version (like this one).

This blueprint contains a 2 stair pieces for easy stacking into a spiral using blueprint build mode.