The SteelQR – C12 is a premium Bitcoin seed phrase backup plate, engineered for long-term protection of your 12-word Bitcoin mnemonic seed. Crafted from 316L military-grade stainless steel and measuring 3mm thick, it offers unmatched durability, corrosion resistance, and resilience against fire, water, and physical damage.
Designed and manufactured by Vulcan21, the SteelQR – C12 is an open-source hardware device licensed under GPLv3. By converting your 12-word seed into a compact QR code, it allows for a secure and convenient backup that is both tamper-proof and portable.
Key Features:
- Precision-crafted from 316L military-grade stainless steel
- 3mm thickness for maximum durability and fire resistance
- Stores your 12-word Bitcoin mnemonic seed as a compact QR code
- Tamper-proof, waterproof, and corrosion-resistant
- Designed for SeedSigner compatibility
- Open-source hardware, licensed under GPLv3 by Vulcan21
- Portable and discreet, ideal for long-term cold storage
Unlike paper or digital backups, the SteelQR – C12 ensures your Bitcoin seed remains safe, durable, and recoverable for decades. Whether you’re a Bitcoin holder, sovereign individual, or self-custody advocate, this steel plate provides a bulletproof backup to safeguard your digital wealth.
The SteelQR – C24 is a military-grade stainless steel backup engineered to secure your 24-word Bitcoin seed phrase in the form of a compact QR code. Built from 316L stainless steel and measuring 3mm thick, this plate is corrosion-resistant, fireproof, and tamper-proof, ensuring your Bitcoin backup lasts for generations.
Designed with SeedSigner compatibility, the SteelQR – C24 allows you to encode your seed phrase and permanently mark it with either a manual or automatic center punch (sold separately). Once etched, the QR code becomes an air-gapped, offline cold storage solution — completely resistant to online threats, physical damage, and environmental risks.
Key Features:
- Precision-engineered from 316L military-grade stainless steel
- 3mm thick for maximum durability and fire resistance
- Stores your 24-word Bitcoin mnemonic seed phrase in a compact QR code
- Fully tamper-resistant, waterproof, and corrosion-proof
- Open-source hardware, released under GPLv3 by Vulcan21
- Seamless compatibility with SeedSigner devices
- Portable and discreet — perfect for long-term cold storage
Unlike paper backups or standard hardware wallets, the SteelQR – C24 offers sovereign-grade self-custody by keeping your seed phrase offline and indestructible. The QR code format ensures quick and accurate restoration with SeedSigner while preventing unauthorized readability on non-compatible devices.
Whether you are a Bitcoin holder, sovereign individual, or self-custody advocate, the SteelQR – C24 is your ultimate bulletproof backup for securing Bitcoin wealth against loss, theft, fire, or corrosion.
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