[Shop-talk] drilling holes in sheetmetal

[john niolon]

10 gauge is pretty thick for a cheap knockout  0.139"
that's better than a 1/8".  I doubt that the HF punches would hold up long 
cutting that...Greenlee yes, but HF ??

I'd go with the unibit or the holesaw since cosmetics isn't that important 
and keep my punches for lighter stuff that has to be pretty.

john



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