This is such a cool item! I've immediately put a couple of them to use, assisting my potted cherry tomato plants to rise upward instead of dropping to the ground. You place the simple orange hook onto the tomato cage, wrap the nylon cord around the tomato branch and loop the nylon cordto itself via the hook on the spool.
I can think of other uses -- temporary clothes line while traveling for overnight drying of lightweight items, such as lingerie.
Likely a way for fishermen to use this item, too!