Seems quite complex, but knockouts aren't coming off the way they should. They have creases, but the metal isn't sharp enough to break. If the metal does not have cuts, and a die is needed to open the hole, then it is better to do without a contour. It's not just for looks! The product looks good in the photos but is not well made. If you're getting paid to do this work, buy something more expensive and quicker to install. If you don't get paid for this job, chances are you don't have the right knockout tool and you end up damaging the box with a dremel or hacksaw. I will not buy again.
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