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Using Two Wrenches
The best way to open a padlock without a key is with the help of two same-sized wrenches. The bigger the wrench, the more force you can exert on the padlock. Stick one end of each of the wrenches inside the U-loop of the padlock and bring the handles close by exerting pressure from both hands. With enough force on the midline, you'll be able to break the shackle in two.
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