Not to mention.......anything that CAN extract buggered screws is worth demonstrating. A $45 zip-tie cutter? That's too much disposable income, maybe OK for an overpaid shill.
Poking steel tools into an electrical enclosure? Not a good habit; live or not. I'm not convinced those stylish (hard to clean) grips pass for 600v insulation.
All said, Marv's find, the alternate screw-removal pliers are reasonable enough.