







Case - Konstella K-003 - Black
Founded in Osaka in 1969, Toyo Steel created the first one-piece stamped steel toolbox. A simple, strong, and durable design, emblematic of Japanese craftsmanship.
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The Konstella K-003 Black
Konstella is the elegant business collection combining design, utility, and the strength of Toyo Steel. The K-003 collection is a sturdy everyday briefcase.
Made from premium aluminum alloy, this large-capacity briefcase will protect your laptop and documents thanks to its cushions and leather strap.
PRODUCT FEATURES
- Durable and functional
- Leather set
- Protected by cushions
- Aluminum alloy, Leather
- Durable and functional
- Multiple 6 pockets (2 for A4 documents, 2 for A6 documents, 2 for pen holders) 4 small nails at the bottom
LEARN MORE ABOUT TOYO STEEL
Toyo Steel Co. Ltd, founded in 1969 in Osaka, is the specialist of the renowned "Toolbox" known for its many qualities: lightweight, portable, extremely durable as it is made from a single seamless piece. Every detail is well thought out: rounded edges to avoid injury, retractable handle, locking buckle, embossed top/bottom for stacking. The toolbox's use is versatile; it fits in every room of the house to store pencils, sewing threads, phones, glasses, kitchen utensils... and of course tools.
Caractéristiques
- Poids
- 900 g
- Matière
- Aluminium, Leather
- Couleur
- Black
- Origine
- Osaka, Japan
- Marque depuis
- 1969

At the Toyo Steel workshop, since 1969
Each box is made in Higashi Osaka, in the same workshop for over half a century. A sheet of steel, a press, a craft passed down.





THE TOYO STEEL EXPERTISE
What makes this box unique
A single steel sheet, zero welding
Each box is made from a single sheet of cold-pressed steel. No welding, no weak points. A one-piece structure that ensures exceptional durability over time.
Rounded corners, no sharp edges
Rounded corners are not just aesthetic: they eliminate sharp edges, make cleaning easier, and enhance the structural strength of each box.
Lightweight but indestructible
Cold-rolled steel offers an outstanding strength-to-weight ratio. Easy to carry, hard to damage — an item designed for everyday use, not for the closet.
Closure adjusted by interlocking
The lid fits precisely thanks to the pressing technique. A clean closure, without clips or mechanisms — pure Japanese simplicity.
Epoxy finish, durable color
Epoxy paint resists scratches, rust, and stains. The colors retain their brightness over the years, even with heavy use.
Made in Japan since 1969
Each box comes from the same workshop in Osaka. More than half a century of expertise, a design that has hardly changed — because it didn’t need to.




































