Build an order ↓STAINLESS-STEEL SEED VAULT256 BITS
Your seed.
Set in steel.
A mechanical, all-steel backup for the entropy behind a 24-word BIP39 wallet. No electronics. No vendor dependency.
01 / ARCHITECTURE
One bit at a time.
Visible. Verifiable.
Each of sixteen layers holds sixteen radial positions. Four visual sectors make every row easier to set and read back before the rail locks the selected states.
The exact zero-mark and viewing orientation remain tied to the final production drawing.
03 / DATA TO STEEL
Words become
physical positions.
The companion tool exposes each conversion step locally, then turns 256-bit entropy into sixteen clear assembly rows.
- 01
Validate
Confirm the BIP39 words and checksum offline.
- 02
Decode
Recover the exact 256-bit entropy.
- 03
Set
Map one 16-bit row to each layer.
- 04
Verify
Read back the full object before locking it.
Mnemonic, hex, binary, checksum, and the 16 × 16 map.
04 / OPTIONAL IDENTITY
Public QR.
Private seed.
A unique QR can identify each component using public identifiers supplied by the owner. The seed, private keys, and passphrase never go to the manufacturer.
The derivation path and signing protocol will be published before this option is offered for production.
05 / PEOPLE
A small team.
A long-term object.
Steellet combines mechanical prototyping, security research, product direction, and manufacturing around one intentionally narrow purpose.
Meet the project ↗Incubated with the support and affection of MoneyLab.06 / CUSTOM ORDER
Make it yours,
without sharing secrets.
Define finish, engraving, payment preference, and optional public QR. The brief is created locally and sends nothing.
Open order configurator +
NON-SENSITIVE ORDER BRIEF
STEELLET — ORDER BRIEF Model: Current 16 × 16 / 256-bit architecture Quantity: 1 Finish: Natural stainless steel Engraving: None Payment preference: Bitcoin Unique public-identifier QR per part: No Pricing, supported assets, delivery, and final mechanical options: to be confirmed.This drafts the specification locally. It is not checkout and sends nothing until an order channel and final pricing are published.
07 / ESSENTIALS
Four useful answers.
Is Steellet an electronic hardware wallet?
No. It is a physical backup for wallet entropy and does not sign transactions.
Does the offline tool upload my seed?
No. Wait until it reports “cached,” disconnect every network, and only then use it with real recovery material.
Does the current object support 12 words?
The tool converts 12-word phrases, but the production physical map is currently defined for 24-word, 256-bit entropy.
Can the BIP39 seed be converted back to words?
No. The reversible value is entropy. The later 512-bit BIP39 seed cannot be reversed into the mnemonic.
STEELLET / PHYSICAL COLD STORAGE