Double Carabiner

I modified Charlie1982's awesome design (https://www.thingiverse.com/thing:1008943) a bit and made it a double carabiner. 

For me, the model has worked well with both 100% and 75% scaling. For the materials I have tested so far ABS and PETG. With ABS I used a brim, because otherwise the closure came off the print bed. I used a layer hight of 0.2mm and 100% infill. 

You can find instructions for the assembly at the description of the orginal design. 

Another variant of the carabiner, optimized for scaling to smaller sizes, is also available.