Was skeptical for a while, finally pulled the trigger since I had a bunch of recycled wire laying around and I don’t regret buying this. Even at $60 this thing shows it’s worth FAST. Once you add a drill motor to the equation, it takes longer to pull the insulation off then it does to score it. I’ve stripped wire from 8AWG Cu to 350KCM Cu it does well on most wire sizes I would say it’s capable up to 500 Cu. Recommend it 10/10!