noble. crafters
2022–

noble. note

A leather pocket notebook that attaches magnetically to the back of an iPhone. It has a machined aluminium frame and a pen that clips into the spine.

Who it is for

People who write by hand. It attaches to the back of an iPhone.

Made with
  • Sohan KobiriStarted noble. crafters with me.
    Canada
  • Tomás RiveroStarted noble. crafters with me. Leads the industrial design.
    Buenos Aires
  • Machinists and leather workersMachine the aluminium frames and finish the leather.
    Shenzhen
My part

Design, manufacturing, brand and operations.

Numbers
  • the titanium pen24 g
    about the weight of an AA battery
  • steel sheet behind the magnets0.05 mm
    thinner than a human hair
  • force holding the pen in the spine3 to 4 N
    enough that the pen slides open before it comes out
  • magnets in the back cover18
    arranged to match MagSafe on an iPhone
The work

I started noble. crafters with Sohan Kobiri and Tomás Rivero. Tomás leads the industrial design from Buenos Aires. I work on the design, manufacturing, brand and operations.

The cover is top grain vegetable tanned leather over a machined 7075 aluminium frame. Inside the back cover sits a ring of eighteen magnets that matches MagSafe on the back of an iPhone. Behind them is a 0.05 mm sheet of magnetic steel that makes the magnets hold harder. A microfiber layer covers the steel so the pages rest on a flat surface.

The pen extends and clips into the spine. The spine holds it harder than the pen’s own catch, so when you pull the pen with one hand, it slides open first and then comes out.

One problem: the first frames were machined from 6061 aluminium, and they wore down. A stainless steel ball presses into the frame to hold the pen. Steel is much harder than 6061 aluminium, so the ball wore a groove into the frame each time the pen moved. We switched to 7075 aluminium, an aluminium and zinc alloy with nearly twice the strength at about the same weight. It takes longer to machine, but it does not wear.

Two Kickstarter campaigns paid for the tooling. The first raised $27,029 from 263 backers in 2023. The second raised $61,289 from 646 backers in 2025.

Links