New Stapler Shaped Wire Stripper Drving Me Nuts

I purchased a new stapler shaped wire stripper that supposedly strips wires from 24 gauge down to 16 gauge. The only adjustment is a brass colored knurled small knob at the rear of the stripper that revolves with the fingers. The stripper seems to bite through the insulation and remove several strands of copper conductor with larger gauge wire or smaller gauge wire without adjustment. I can see it will remove strands of copper with say 16 gauge wire but without adjusting or touching anything when I try it on 24 gauge it does the same thing. Turning the knob does not seem to do much if any of you own such a wire stripper can you give me some tips on adjusting that little knob like maybe how many turns in order to get it to stop taking strands of copper wire as well as the insulation off. It would seem to me that the action mechanism is to bite through insulation tension merrily to overcome the thickness of the insulation and then of course the pulling stripping operation follows but this thing seems to strip everything down to the point where it overbites.

I purchased this critter so I have an ability of stripping the ends of little stubs of wire that are sticking out of projects or regular stripper doesn't work too good when there's only an inch or so of wire sticking out of something.

Anyone who dares laugh at this question I will do a voodoo dance and reverse the polarity inside your converter. I have a set of very weak hands actually one and a half hands and arthritic fingers. That little adjustment knob is very hard for my fingers to twist and I'm afraid if I twisted counterclockwise too far that the stapler type stripper is going to pop apart and I won't be able to put it back together not with my hand strength.

Thanks Guys!