Batarang from the Arkham game series. Designed to be folded up, as they do in the game
This was my first ever attempt at designing something to be 3D printed, from about 4 years ago now. It needs updating, as I don't think the folding mechanism lasted very long when I printed my test one. Unfortunately I don't have the time to do so currently
STL files and Solidworks files have been included, so people can edit the original files if they wish
The author hasn't provided the model origin yet.