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I live at the shore and have tested over 30 beach umbrellas — this secure Anchor Works is the one I recommend to my friends
The Anchor Works umbrella is the sturdiest I've ever tried. It can withstand winds up to 25 mph. The secret is its anchor that burrows into the sand.
EDN5d
Push ON, Push OFF for AC voltages
Extending Woodward's original "Flip ON Flop OFF" for AC voltages, switching power ON and OFF using a pushbutton or a ...