Metric Post and Hole Size Checker
thingiverse
Lock created to stop patio umbrella from spinning wildly when tilted to shield the sun. Made for a 37mm umbrella pole, it may also fit sizes between 36 and 38 millimeters, but this has not been thoroughly tested yet. If you found this helpful, please contribute what you think is fair via paypal.me. Your contribution will help offset the time spent designing.
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