Plant Hanger
Great for hanging tomato plants and other vines in a greenhouse.
A frame has been made around the twist clip. This can be cut off with a penknife so the hanger slots in flush with a slot.
You may be interested in a remixed version that can be found at: https://www.thingiverse.com/thing:234844
The product has taken many hours and research testing to be produced. Since I am a believer of not actively charging anybody for a design I've released it under attributed CC. If you feel like it you are welcome to tip in order to assist on future designs but it is up to you.