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Thats what I was looking at, I am sure I have a 1/2" knockout laying around the shop. Like I said it's few and far between I have a need for them.
If you rarely need it just use your step bit.
 

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It depends how many I have to drill I hate getting the hot steel burrs raining down on me.
you still need to drill the hole for the knock out stud. 1/2" minimum for most knock out kits and 3/4" if you need to jog the hole a little one way or another.

I like those carbide hole saw cutters if I had a choice. A plain hole saw or step bit work too.
 

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Contractor of the Month
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you still need to drill the hole for the knock out stud. 1/2" minimum for most knock out kits and 3/4" if you need to jog the hole a little one way or another.

I like those carbide hole saw cutters if I had a choice. A plain hole saw or step bit work too.
Get a c-punch.
 
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