|| There to help you automate the creation of single parts out of other single parts. A step up from manual labor if I’ve ever seen one!
|| ~ Caterina Parks's assistant Steve
A constructor as seen on the official site
A constructor is a building used to craft basic items automatically, from one ingredient.
This building can be overclocked, allowing it to run at (at least) 150% speed, at the cost of increased power consumption.
This machine will likely be able to craft nearly any basic component or item, it's likely able to produce tools, weapons, components, and perhaps even other machines. Due to the lack of the equivalent of an inserter in the trailers and the presence of what appears to be input and output slots on machine designs, some are theorizing that this and other machines take inputs and outputs only from conveyors.