Carbonator Caps & Hole Punch

I just invested in a starter keg setup, and I made a batch of carbonator caps for beer transportation.   Using this article as a starting point I drilled the requisite hole using standard twist drill bits.  The problem with large bits and soft material is that they tend to suddenly “grab” and make large radial cuts.   A 7/16″ hole punch works much better, and the valves have no problem fitting into the hole.  I got my punches from Amazon for cheap.

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