The Tech 1 Construction Kbot is the cheapest construction unit in the game. It is slow and weak, so never stray too far from safety. On top of building everything the commander builds, this constructor builds advanced T1 structures, including the T2 Kbot Lab.
Use in groups to increase build speed.
To build more advanced units, you need to build the T2 Construction Kbot in the T2 Kbot Lab.