An All-Metal Pen Shaped Like a Pencil
Pu takes its silhouette from the pencil but makes it in aluminium. Nine CNC-cut facets give it defined edges, and the extra flat surface in the grip makes long sessions easier — the borrowing is of posture, not of drawbacks.
The pencil shape has stayed popular for one reason: it sits correctly in the hand — three fingers on three flats, centre of gravity forward. Pu borrows that posture and makes it in aluminium, keeping the slim, plain, retro character while removing the weakness of a wooden shaft snapping.
What nine facets actually solve
A cylinder is not a bad shape. It is too neutral — on a desk or in someone else's hand, it does not read as an object with a point of view. Nine CNC-cut facets give flat faces and a defined edge, so as the pen turns, the highlight moves from face to face — something a cylinder cannot produce.
The nine-facet section: every face reflects at a different angle, so the highlight shifts across faces as it turns — a layer a round barrel cannot give
There is a more practical gain in the grip. A cylinder contacts the fingers through one curved surface; a nine-facet shape offers three flats that can take load steadily, so long sessions do not leave the hand making constant small corrections.
Specification and process
| Item | Specification |
| Model | C9-B-b |
| Size / weight | 113 × 9.0mm ｜ about 16g |
| Material | Aluminium, CNC machined, anodised |
| Finish | ∅9 barrel with an octagonal pencil profile |
| Tip mechanism | Twist to retract |
| Refill | G5/G7 standard refill |
| Colours | Orange, glacier blue, cherry pink, piano black, titanium grey |
The tip and retract mechanism: the tail twists, the point withdraws fully into the barrel, so it cannot leak in a bag
Why all metal
What students ask of a pen comes down to two things: it survives being dropped, and it does not snap. A wooden pencil breaking at the bottom of a schoolbag is routine; an all-metal structure removes the risk outright. Aluminium's impact resistance combined with an anodised surface means everyday knocks will not expose a lighter base colour the way plated parts do — worth more in daily student use than any styling parameter.
The twist tip solves a separate problem: no cap means no cap to lose. In lectures, study sessions and exams, a capless pen is one fewer thing to keep track of.
The trade-off should be stated. At 16g this is noticeably heavier than a wooden pencil, and the faceted profile has a definite tactile edge rather than an entirely smooth feel. Anyone who prefers a soft, fully round grip should try one first.
In one sentence: Pu is a pen whose posture is like a pencil and whose material is not — borrowing the part of a pencil that sits right in the hand, and using metal to fix the part that breaks too early.
