Card Case SPRING+ Titanium & Black Carbon
This product is made to order upon receipt of your request.
Please note that cancellations cannot be accepted after an order is placed.
Please read the details at the bottom of the page carefully.
For current delivery times, please check the top of the website or refer to this link.
Machined from pure titanium, a skin-friendly material requiring attentive processing.
Paired with authentic black carbon fiber, creating a subtle and modern contrast.
●Dimensions & Weight
Approx. W 85.5mm × H 105mm × Thickness 11.2mm
Weight: Approx. 168g
Custom engraving is available for this product.
If you would like to add engraving, please purchase the option separately from the dedicated cart at the bottom of the page.
An original creation crafted by industrial designer and product creator Bunshu Hachiro, who directly operates machine tools to shape each piece. The form embodies a refined aesthetic guided by thoughtful, meticulous design.
Built for long-lasting use, this product features an assembled structure where every component is fastened with screws to facilitate maintenance and repair. These original FACTRON screws feature a dedicated, specialized shape designed to be removed exclusively with a matching proprietary screwdriver.
During assembly, each component is carefully adjusted to account for subtle individual variations, ensuring balanced alignment throughout the finished piece. Screws are secured prior to shipping to prevent loosening; please refrain from disassembling the product yourself.
■ Materials
- Duralumin A2017: A lightweight yet robust aluminum alloy widely used in aerospace applications.
- Titanium: A material requiring meticulous, extended machining time, highly valued for its gentle feel on the skin, dependable strength, lightness, and excellent corrosion resistance.
● Handcrafted in Tokyo, Japan (MADE IN JAPAN)
*If exposed to moisture, please wipe dry promptly with a soft cloth.
*Product specifications, appearance, and included accessories are subject to change without prior notice for ongoing refinement.
*Component shapes may be subtly updated as part of continuous product improvements.
*Actual colors may vary slightly depending on your monitor settings.
*As each piece is made to order, cancellations cannot be accepted once an order is placed.
Product Description
A card case (business card case) that makes dreams come true.
In 2007, an era when smartphones did not yet exist,
FACTRON, which established the genre of metal-machined jackets for mobile devices, will now establish the genre of "metal-machined card cases."
FACTRON's card case (business card case) makes an impact during the ceremony of the first business card exchange, a business setting, and creates higher-level business opportunities.
A wide variety of series and variations express the user's individuality.
The smooth, sleek feel unique to machined products.
Each product is meticulously machined from a single piece of solid material over time,
and the carefully crafted form, finished by hand, enhances its value.

FACTRON also designs springs.
The opening and closing spring, inspired by a suspension, has an unequal pitch calculated specifically for this case.
The fusion of design and function is the theme of this model.
The completed form is full of originality in every aspect.

SPRING+ (Spring Plus)
From left: Titanium & Black Carbon, Shiny Silver & Black Leather, Shiny Silver & Black Carbon, Black & Black Carbon, Shiny Silver & Silver Carbon.
The combination of metal and different materials expresses individuality.

SPRING
From left: Titanium, Black, Shiny Silver.
The SPRING also offers an option to engrave your name or favorite words.
The text is deeply carved with engraving.

A top opening, like a lighter, that opens wide for easy retrieval of business cards.


Made from Duralumin A2017 (aluminum alloy) and pure titanium.
Duralumin A2017 is a light and strong material used in aircraft, etc.
Titanium is very expensive and difficult to process, requiring a long time to cut,
However, it is an extremely ideal material that is very user-friendly in terms of strength, lightness, and corrosion resistance.
The body features tool marks that give it a smooth feel, unique to machined products.

The main body is assembled with FACTRON's two types of original 3-hole screws.
Black Carbon (Real Carbon)

Beautiful, silky gloss black, unique to real carbon.
It changes its appearance depending on the angle of light.
Silver Carbon (Real Carbon)

Glossy silver carbon woven with metal threads.
Enjoy a beautiful silky luster and sheen.
Black Leather (Natural Cowhide)

Shrunken leather made from natural cowhide (calf).
It has a calm appearance and a soft touch.
Featured product
Card Case SPRING Letter Engraving Option
Custom Engraving Option for Card Case SPRING.
Please make sure to confirm your item before ordering.
This optional service is available exclusively on this official online store.
Available for both Duralumin and Titanium models.
- Supported Characters: Uppercase and lowercase English letters, numbers, " . " (period), " / " (slash), and " - " (hyphen)
- Character Limit: 1 to 20 characters
(Platform-dependent characters, special symbols, and emojis are not supported) - Engraved in the same font and size as the official FACTRON logo.
To add this option, please enter your desired text in the field below and purchase it together with your product using the "Add to cart" button.
Engraving Details
Pickup currently not available