This is a contraption for carrying three juggling pins. A carabiner on top for attaching to backpack.Print with 1 shell and 25% fill. I used 120 C for build platform temp. Use a knife to separate the opening of the carabiner.*Update: Increased the thickness of carabiner for more strength **Update2: I scrapped the entire carabiner in exchange for a heartier connection for a real carabiner.