This is a small gadget to fix a broken foldable clothes dry rack. One of my bars welding was broken, so i dediced to design this to extend the live of my foldable rack. Is designed for 2.5mm diameter bars, and the structure is 12mm diameter. It works perfectly! 

Reccomend to print with 100% filled walls, to be stronger enough. Just refer to the pictures to see how to assembly.