Carabiner with lock that I created for study For greater strength, increase the number of walls. Normally I use four walls but I recommend using five or more. The use of supports is required in the parts highlighted in the image. WARNING: Do not use for climbing! Share my creations is the way I found to contribute and thank the help I've always had from the 3D printing community. I'll try to keep the posts consistent, but if you'd like to help me out with a tip, please use the link below. Thanks! https://www.printables.com/model/95972-screw-lock-carabiner