These are fighter / assault bombers used in Star Wars movie during the Clone Wars / Galactic Civic wars.
It is built by Koensayr Manufacturing. One of its famous feature is where an R2 unit can be plugged in and Y-Wing will activates R2 as a co-pilot. R2 will manages the whole system if it needs too.
I heard that Anakin uses this ship to hunt General Grievous’s flagship Malevolence.
The model maker made 3 paper craft version but only 2 is still available freely right now. The other has been deleted by file host.
Model is made and shares freely by Paragon Cardmodel. Each model requires 3 sheets of printing paper. Difficulty – Easy.