Mark One

Mark One

A minimal, durable, retractable pen.

Mark One is a custom machined, all-metal, retractable pen with a ceramic based exterior coating for long lasting durability. It’s built for our favorite rollerball refill, and has a satisfying-as-heck custom click mechanism.
Color
Material
Clip
$85
$85
Variant ID: 17522303008833 Force BIS: Raw metafields: {}
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Looking for ink refills? Get them here.

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“
The perfect pen to match an already great notebook.
”
– The Pen Addict
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Minimal

It’s literally seamless.

Mark One has a completely seamless design, which was quite an engineering feat. The pen has no excess ornamentation or logo, and comes in several colors. The polished steel knocks provide a nice little accent to each, and give Mark One a sophisticated look without looking overly tactical.

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Durable

Made to last a lifetime.

Mark One is incredibly durable. It is made entirely out of metal, including the custom click mechanism. The pen is coated with Cerakote, which is an extremely durable ceramic-polymer coating (technical specifications for Cerakote). It gives the pen a really nice, matte feel. This pen should last a lifetime.

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Retractable

A completely custom click mechanism.

There are many off-the-shelf click mechanisms we could have used, but none of them were quite right for what we wanted, so naturally, we made our own. It is made entirely out of metal and, as far as we know, it is the only all-metal mechanism on the market that has an actual “click” action. It is satisfying as heck to click.

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Refill

Built for an amazing rollerball refill.

Mark One ships with our favorite refill, the Schmidt P8126 rollerball. This is a fantastic cartridge; the ink flows smoothly and dries quickly. However, Mark One will accept any Parker-style refill, which means there are many options for pen cartridges that our pen will accept. Check out our refill guide for other options, or purchase more refills here.

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Specifications

  • Dimensions: 128 mm long, 11 mm diameter. (5 in x 0.43 in)
  • Weight: Aluminum: 25 grams (0.88 oz). Steel: 48 grams (1.70 oz).
  • Aluminum or steel body. Aluminum mechanism. Polished steel knock.
  • Cerakote coating, matte finish. See technical specifications for Cerakote.
  • Included Refill: Schmidt P8126. Black ink with 0.6mm tip diameter.
Designed to last.
No asterisks.
The Studio Neat Lifetime Guarantee
At Studio Neat, we want to foster a more considered form of consumption. What if one were to buy objects with the intention of using them for the rest of their lives? The object would need to be long-lasting—both in its durable construction and in its timeless design. Everything we make fits this criteria, and thus is backed by our Studio Neat Lifetime Guarantee. A no asterisks, no strings attached approach to standing behind our products. Should anything need fixing in your Studio Neat product, we will repair or replace it, no questions asked. We are in it for the long haul, and are glad to have you along for the ride.

Frequently Asked Questions

What is Cerakote?

Cerakote is an extremely durable ceramic-polymer coating. It creates a matte, super smooth finish that ages beautifully. Learn more about it here.

Is the Mark One pen refillable?

Yes! Mark One will accept any Parker-style refill. We wrote up an extensive guide here. Mark One ships with our favorite refill, the Schmidt P8126 rollerball, and you can purchase more of those here.

What configurations and colors does Mark One come in?

Mark One is available in many colorways, which you can see in the selector at the top of the page. Mark One is also available in two different body materials: aluminum and steel. Steel weights about twice as much as aluminum, so choose that if you prefer a heftier, weightier pen.

How long is the Mark One?

Mark One is 128 mm (~5 inches) long.

What color ink does Mark One come with?

Mark One comes with black ink. You can purchase blue ink here.

Customer Reviews

Based on 436 reviews
78%
(341)
11%
(50)
4%
(19)
2%
(10)
4%
(16)
R
Ryan

Really nice pin. Should have gotten one with a clip, so I just ordered another.

M
Mike Haycock (Sarasota, US)
Mark one

I collect pens and have found my new favorite. Looks great, feels good in the hand and has great writing cartridge.

G
Grant Adams (San Jose, US)
Heavy weight and great quality

this was a present for my wife and she loves the weight and quality of the pen!

E
Eric P (Hudsonville, US)
A Love Letter to the Mark One: Studio Neat’s Masterpiece of Modern Writing

Studio Neat has always had an eye for design, but with the Mark One they have truly outdone themselves. Right out of the package, the pen communicates a sense of quality and intention. The orange anodized aluminum finish is striking without being garish, and the weight of it in hand strikes a perfect balance—not too heavy to tire the hand, yet not so light that it feels insubstantial. It exudes confidence, the kind that can only come from impeccable design and material choices.

The minimalist aesthetic resonates immediately: clean lines, precisely machined edges. It’s obvious that every detail was considered—not a single element feels superfluous.

M
Mark Ryan (Phoenix, US)
So nice to have a roller ball pen without a cap to lose

The weight and balance are just right. Pen diameter is also ideal. The click mechanism is rock solid. Great choice, probably only choice, for RollerBall refill. I am surprised that I do not miss the pocket clip. So much nicer without it. Liked it so much, I now have 3 different colors.

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