The edges are slightly bent and therefore very dull. Isolation becomes more squeezed than "taken the bait" and you have strong pull on the cable. It quickly to tears in sensitive strands out some wires. That's what I wanted to avoid by this professional tool. Thin wire ends are bent beyond "taken the bait" instead, because the cutting does not lie close enough together. Perhaps the stripping works better with thicker, solid conductors, but for thin wire ends, the tool is not suitable - because I come with a lot of feeling with a print pliers cope better.