What is Reddit's opinion of
Punch,Knockout,Round,3/4 In?
From 3.5 billion Reddit comments
2 reviews of this product found across Reddit:
1 point
·
30th Jan 2015
http://www.amazon.ca/Greenlee-730BB-3-Standard-Knockout-4-Inch/dp/B001UL13M2
This is what you want. Ask on your local homebrew club's forum if someone has one, because these are expensive and only used a few times. You can also go to a metal shop in an industrial park and ask them to do it for you. They won't charge a lot and they will clean it up nice for you.
1 point
·
20th Jan 2016
What you are looking for is a radio punch instead of a conduit punch. This will work:
http://www.amazon.com/Greenlee-730BB-3-Standard-Knockout-4-Inch/dp/B001UL13M2
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