About the same price as the Greenlee Slug Buster set, this set includes 1-1/2" and 2" knockouts so the price is definitely a plus. In a previous life I was an electrician and Klein's tools were almost exclusively what the craftsmen used. Quality and durability weren't out of the question (I still have screwdrivers from the early 80's), but they were made in Chicago by Mathias Klein and Sons. I had never seen or heard of Klein knockout knives 10 years ago so I guess it's something new. We'll see how well they hold up to occasional use as the knockout set is made in Mexico.