Pentel Orenz Nero Mechanical Black Pencil, 0.3mm, PP3003-A,

[Size] Shaft diameter 10mm x depth 11mm x length 143mm / weight 18g / lead diameter (mm): 0.3 [Body design] Matte black, 12-sided axle, low center of gravity balance [Features] Just knock once at the beginning, and the lead will come out automatically after that. [Material] Tip and knock: brass / Front shaft: nylon + iron / Rear shaft: ABS / Clip: iron The tip slides according to how much lead is left, protecting the lead as you write, so even ultra-fine leads won't break. [Equipped with the Orenz System] Protect the lead with the pipe while writing! / The Orenz System prevents the lead from breaking The automatic lead advance mechanism advances the lead every time you release the pen tip, eliminating the need to knock.