On 2012-02-23, Michael A. Terrell wrote:

"DoN. Nichols" wrote:

Round, or rectangular?


The punch was round, but large for the old industrial & military
style meters. It also allowed surface mounting of some rectangular
meters.

Yes, I am familiar with those. Also the "knockout" punches for
conduit sizes, which are mis-marked if you want a specific hole
diameter, instead of a hole to fit a given size of conduit. :-)

Enjoy,
DoN.

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