I had to pop a knockout out in a panel in a tight spot, where I would otherwise cut a low voltage plate in, and and hammer the knockout out. I had a case, where I did not have clearance to do so. I used this on a Hubbell Network Enclosure panel in drywall, which barely had a gap around it. I had to jab a bigger gap, but the panel surround/door covered it right up. The tool worked without a hitch, and was almost easier than hammering the knockout out. I'd highly recommend this tool!
Rating: [5 of 5 Stars!]