Question: what are the different types of mechanical pencil?
Answer: Mechanical Pencils: 0.3mm, 0.5mm, 0.7mm, 0.9mm, 2mm.
Clutch Pencils: 2mm, 5.6mm.
Pencils shaped like wooden pencils: OHTO Sharp Pencil, Fixpencil 22 (clutch), Caran d'Ache 844, Cleo Skribent SilverSign.
Chunky sketching pencils: Lamy Scribble, Kaweco Sketch Up, e+m Sketch Pencil.