At work we had a different brand wire stripper. It was one with a single blade. And on any different size wire, the settings had to be chNged. This one I bought has 7 slots. I have stripoed everything from #14 solid to #2 stranded. And i have stripped 5kv insulation off #6. I have also stripped the outer jacket on 7 conductor #10 canle. This is oh do much better yhan the old one. I would buy it agzin when and if this one wears out.