Kuru Toga
Used by 2 peopleamazon.com ↗
“– and I also possess a single perfect mechanical pencil, an Uni Kuru Toga with size 0.5 lead.”
Savannah Million Interview, UX designer · via Uses This 
“These days, often with a 0.5mm Uni-ball Kuru Toga mechanical pencil, which auto-rotates the lead to keep it sharp.”
Brendan Gregg Interview, Senior performance architect (Netflix) · via Uses This