Description of Klein Tools 2 Inch Knockout Punch 53728SEN
Punch Set optimized design reduces wrench effort. Slugs are split inside for easy removal. Maximum capacity of 10 gauge mild steel. Also cuts aluminum, fiberglass and plastic. Punches holes cleanly and accurately. Set includes 1/2-Inch (13 mm) punch and die with 3/8-Inch (9.5 mm) draw stud.
This will not cut a 3/4 inch hole as you might think from the description. He uses a 3/4 inch hole to cut a hole of unknown size. Nowhere on the packaging does it say the size of the hole it cuts.
I wanted a 1/2" punch but nowhere in the ad did it say it was for 1/2" tubing would it would Fit a 7/7 hole 8". I wanted to make 1/2" holes in the ceiling light for pull chain switches. How can you advertise that it's a half hole punch without saying it is is it a line?
Pros
Optimized design of the punch set reduces wrench effort
Fulfills its purpose. Great for connecting 1/2" tubing. Great price and service. I'm keeping it for future use but was actually looking for a 1/2" punch and this machine makes a 7/8" hole Well known to electricians but useful if the fact is included in the description.