I see that prixat had given it a close look ... and was the first to mention,

blades between the plastic.

...and the plastic guides seem to make different widths.

Also a very good observation. 

I think its a Wire Stripper.

Sorry, No. 

Generally, wire strippers have 2 opposing concave blades ... in order to get
the insulation off all sides of the wire. 

or it could be a trimmer for really stubborn nasal hair

LOL.  As it is about 3/4 inch in diameter ... it just might be a little uncomfortable
if used for that purpose.  Very clever surmise ... but ... sorry, No. 

Thanks ...

--
Martin