When drilling out your T-nut holes use a templet, then knock out 4 sheets at a time  with a spade bit. Dipping the tip in a glass of water once for each sheet on each hole will  make a drastic improvement in the life of a drill bit.
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Nick Weicht
Aug 14, 2014
When drilling out your T-nut holes use a templet, then knock out 4 sheets at a time with a spade bit. Dipping the tip in a glass of water once for each sheet on each hole will make a drastic improvement in the life of a drill bit.

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