Carabiner Chịu Lực Nặng

A very strong Carabiner, it uses the same mechanism on as the “origami carabiner”  so I have linked the video for assembling this type of mechagnism. 

It can hold 100 pounds no problem but begins to crack at 120 and fully breaks ~150 pounds. (In pla+)

I recommend printing it with >50% infill % and with cubic subdivision or something similar. 
For materials Pla or pla+/tough works but if you have access to something like ABS then 100% use that.

Assembly video: 

Update: added a new version that is slightly weaker but much easier to assemble. it is the “easy” variant in the models.

DISCLAIMER! this is NOT safe for rock climbing, please do not try to do so!