I found using a hole-puncher doesn’t work that well. Maybe that’s just my hole-puncher. None-the-less, for all of you that have one, an electric drill works great! I found stacking the CDs on a piece of something (to protect the working surface of course) and drill right threw them is more effective, efficient, and time-saving.
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I don’t know about the proper uses of tools exactly. However, after stinging up many whole CDs I put about a half dozen in a vise and cut them with a hack and a coping saw. I did this because I figured they would spray some shrapnel if I broke them in half.
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