The .stl file includes 3 functioning carabiners that are each (73 mm X 7.7 mm X 48 mm). Print with a raft and external support in provided .stl orientation. For structural integrity and functionality please use ABS filament or 3DXTechu2019s Carbon Fiber ABS Filament with 30% infill or more and 2 or more shells. Check out the free locking ring available on my profile page! Happy printing ,Makers!