I had tried various pliers for “suitcase” connectors, but I finally found this very old design type of pliers to be the most effective. The patent is from 1890 and 1892. My dad had a pair that I talked him out of some 55 or more years ago. In more recent years I have bought 3 or 4 more pairs on the “bay.” I love it. The tool has parallel jaws. Because of the design, it also gives you more force. And it has wire cutters as part of this great tool. The larger size has jaws that open wide enough to use on the “suitcase” connectors.
W. SCHOLLHORN BERNARD CUTTERS PLIERS.