which hole? the larger outer threaded section is meant to thread into the crank arm. then the other part pushes against the spindle to pull or rather push the crank off.
search the park tool website and you tube for videos.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk