Originally Posted by Walking Dude
DUDE........i have a buddy who has one of these. Its my understanding that a 3/4 inch close nipple, takes a 1" hole. Prob. is, the one inch knockout is actually 1 1/8th............the 3/4" knockout runs 7/8ths. So how did your work out to get the correct size hole?
You are right. it will make a larger hole. I have actual 1" punch. You can use these and "Capture" drum between 2 conduit nuts. Like above I use a hole saw and just cut slower . Most people that have trouble with hole saws don't have a descent variable speed drill or just go too fast and when the saw grabs it twist and snaps off the pilot drill or twist the metal and doesn't make a clean hole.
I only posted the punch set as a fix for those who have already made a hole and can not use a hole saw.