Walnut cracker or a lipstick

Is this a functional gadget to crack the walnuts? Or is it just a sleek beauty ?

Does that mean I have to get uniformly-sized walnut with zero tolerance in radius, diameter, perimeter, circumference, so as to fit the walnuts in there ?

A smaller walnut may still well fall within the "qualified-to-be-cracked" group, but a bigger one? I'm still thinking...

Hmmm....better off have a (dual) multi-purpose use for this and make a lipstick out of it at the other end !!! Agree with me, or any wilder ideas from you ?