A fully 3D-printed mechanical pencil, except for the lead of course. 

It works with 0.5-0.7 mm leads and works smoothly with no post-processing needed.

The pencil measures just 9 mm in diameter and weighs only 7 grams. 

It has a twist mechanism to extend or retract the lead.

In theory it shouldn't need any supports, but due to it being so thin and tall 

it needs a brim and some custom, easy to remove supports to reduce wobbling during printing.

It prints in 3 parts, which can be easily assembled as seen below.