Bruno Sisti

thingiverse

Patio Umbrella Lock - Prevents Spinning When Tilted This clever lock keeps your patio umbrella stable when tilted to block the sun's glare. Specifically designed for 37mm umbrella poles, it may also work on 36-38mm sizes, although this has not been thoroughly tested. If you've found this solution helpful, consider showing your appreciation by donating what you think is fair through paypal.me. Your contribution will help offset the time spent designing this useful tool.