4-in-1 Ballpoint Pen WZ-837

Adding a fourth writing option to a multi-function pen sounds like a small change on paper, but it ends up reshaping the entire pen. The WZ-837 takes the same core idea as a three-refill pen and pushes it one step further — four separate selectors instead of three, which means four independent refill mechanisms all sharing the same barrel, and everything about the pen's size and structure scales up to accommodate that extra piece of internal machinery.

That scaling shows up clearly in the dimensions. At 23 mm in diameter, this barrel runs wider than a typical multi-function pen needs, simply because fitting a fourth selector-and-refill assembly alongside the other three takes more internal room than three alone would. Length follows the same logic at 151 mm, and weight lands at 15 g — heavier than a lot of pens in this catalog, though that extra heft comes from genuinely more moving parts packed inside rather than from any single dense material. It's a pen that asks for a slightly firmer grip than a slimmer single-function pen might, and that firmer grip actually fits the pen's role — something meant to be used for structured color coding or organized note-taking tends to sit steadier in hand with a bit more substance to it.

The barrel itself carries a transparent pink finish, which does double duty. On one level, it's simply a distinct, easy-to-spot color choice — pink transparent reads differently on a desk than a plain clear or neutral-toned barrel would, giving the pen a specific visual identity rather than a generic "see-through pen" look. On another level, that transparency still serves the same practical purpose as any clear-barreled multi-function pen: the internal components stay visible, so identifying which selector controls which refill color happens by looking rather than guessing.

Four individual selectors sit around the upper barrel, each tied to its own refill. A press extends the corresponding tip while the other three stay tucked safely inside, protected until needed — no cap involved, just a quick selection each time the task calls for a different color or function. The attached pocket clip keeps things anchored wherever the pen travels, whether that's a planner, a notebook, a uniform pocket, or a document folder.

The broad barrel surface, beyond supporting a stable grip around all that internal mechanism, also offers space for printing — a logo, an organization name, event details, a website, or a promotional message all fit comfortably along a barrel this wide. Customization stretches further into barrel and selector colors, refill combinations, ink types, printing methods, and packaging, giving this four-function structure a fair amount of room to adapt toward a specific stationery collection or event material set.

Shanghai Winning Pen Industrial Co., Ltd. handles the complete production process in-house — development, mold-making, injection molding, refill production, printing, assembly, inspection. Four selectors working independently within one barrel, all needing to press smoothly and disengage cleanly without catching on each other, represents a step up in internal complexity from a three-selector design, and keeping that operation consistent and reliable across a full production run depends on tightly coordinated manufacturing at every stage.

Offices running color-coded document systems, schools and study kit programs, conferences, training sessions, promotional campaigns, branded gift collections. The added fourth option makes it a fit for tasks needing a slightly wider color range than three refills can cover, without adding a second pen to the mix.