Because I've been trying a variety of pencils lately for drawing, I recently bought these "woodless" ones to try out, thinking they might be good for shading, at least. Woodless in this case doesn't mean mechanical, I have plenty of those, or clutch pencils, I have some of those, too, with different lead sizes. These are just big hunks of graphite, partly coated with lacquer. You're supposed to be able to sharpen them by normal methods, knife, sanding block, or sharpener.
I've been trying them out along with my wood pencils for some drawing. They are pretty good for shading, or for when I want a dull point. The "EE" designation for the darkest lead is a bit of an odd one. After a little internet searching, it appears that it was an equivalent of 8B used by some pencil manufacturers, although in this set, it's the grade after 8B. In any case, it's just another extra dark lead.
Anyway, I just thought this was interesting. I'm not making any particular recommendation for or against them, but thought I'd see if anyone else uses them.