Clinger

“Clinger” is one kind of coastal wave breaker similar to a “tetrapod”.

There are three variants in the STL models: 

• CLINGER1.stl is based on the data I found on a webpage by a Japanese company.  Models below are also derived from this one.
• CLINGER2.stl has two more sides “bent”. This shape seems being used more commonly in some places. 
• CLINGER3.stl is having all sides “bent”. This is what I thought the structure would look like before doing the research.

(I don't really know how to describe such geometry in English. Maybe just take a look on the models…)

Under the default orientation, there are three faces better be printed with the support materials.