AMZCNC Manual Knockout Punch Kit, Heavy Duty Metal Sheet Knock Out Box Hole Cutter Conduit Punch Driver Die Set ((Conduit Hole Size) 1-1/4" Knockout Punch)

I was installing an electrical system for a 3200 sqft mixed-use building. Everything was surface conduit with 4” boxes and pull boxes. Multiple boxes needed a hole or a different size hole and these punches came to save the day. I imagine a hand wrench or socket set could be used, but I used cordless impact wrench and it gave me the hole I needed within 15 seconds. It worked well in a tight space and was way better over a hole saw.I’d punch out the smaller plug and use the hole cutter for the larger needed hole. (1/2 knockout to get 3/4; 3/4 knockout to get a 1”). I didn’t try it, but I think the 3/4 punch bolt is larger so you can’t use a 1/2” knockout for a 1” hole.

I needed a smooth hole bored into a large metal cabinet to run a power cord, this did the job quickly and efficiently.

I needed a larger knock out in an electrical box. This kit took care of it quickly and effectively.

Seems to be a good quality tool. The price was for a very low grade tool. I am very happy with the purchase

Very good quality

The functionality of this is spot on....but someone didn't think to include a storage box for this set.

Makes a neat hole in sheet metal. Requires a 0.525” pilot hole in order to do the job. So you’ll want to buy a 9/16” drill bit to make the pilot hole.

I had to return this because I picked the wrong size, but I was very impressed with the quality of construction and packaging. A similar item of lesser quality was $69 at a hardware store.