It might be impossible using wire strippers but it‘s no problem for the Klauke
micro-strip: large cross-sections up to 35 mm² can also be stripped as well as thick insulation (NSGAFÖU), double-insulated cable types plus harder and tougher insulation.
In many applications - for example in switch cabinet construction - stripping and cutting of cables are often completed simultaneously. By use of the integrated cutting die inside the stripping die, conductors of all classes can be cut, regardless of whether they are solid, stranded or fine-stranded.