cerc 54mm

thingiverse

Designed to keep patio umbrellas stable when tilted to shield sunlight, a specialized lock prevents them from spinning out of control. Engineered for 37mm umbrella poles, this solution may also work for 36-38mm sizes, although it hasn't been thoroughly tested. If you found this helpful, please consider donating what you think is fair via my paypal.me account to help offset the time spent on design.