How to use a Nail Puller Properly!

I know it's pretty straight-forward but you would be surprised how many people struggle with these. Also, what's that funny hole for at the end of my nail puller.
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Titanium Stiletto Nail Puller: https://amzn.to/368XsGM
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Видео How to use a Nail Puller Properly! канала Vancouver Carpenter