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Summary
Everything this seed backup solution supports, grouped by category.
- Size & Materials
- 8.8 lb (4 kg)8.3 × 8.3 × 8.3 in (210 × 210 × 210 mm)Water-proofFire-proofCorrosion-proofShock-proof
- Backup Compatibility
- Output Descriptor12 Words BIP-3924 Words BIP-39
SeedHammer manufactures machines that engrave steel plate backups of cryptocurrency seed phrases for self-custody. Its SeedHammer II creates backups for multisignature wallets without requiring separate storage of the wallet descriptor, using open-source controller software on air-gapped hardware. It enables recovery from the minimum number of backup plates via QR codes.
Every spec, organized
Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.
Payment Methods to buy the device
Which methods of payments you can use to buy the device on the official website
- BTC On Chain
YES (via BTCPay)
Accepts Bitcoin payments via on-chain transactions.
- BTC Lightning
YES
Accepts Bitcoin payments via the Lightning Network for faster and cheaper transactions.
- Alt Coins
NO
Accepts payments in alternative cryptocurrencies other than Bitcoin.
- Credit/Debit Card
NO
Accepts traditional credit and debit card payments.
Size & Materials
- Weight
8.8 lb (4 kg)
- Dimensions
8.3 × 8.3 × 8.3 in (210 × 210 × 210 mm)
Length x Width x Height
- Length: the longest side of the device
- Width: the shorter side of the device
- Height: the vertical dimension of the device
- Materials
Stainless Steel
Official Documentation
- Include All Tools
YES
Whether all necessary tools for setup and engraving are included in the package.
- Water-proof
YES
Resistant to water damage and can withstand flooding or water exposure.
- Fire-proof
YES
Resistant to high temperatures and fire damage, protecting your seed phrase in case of fire.
- Crush-proof
?
Resistant to physical crushing and compression forces.
- Corrosion-proof
YES
Resistant to corrosion from chemicals, salt water, and environmental factors.
- Shock-proof
YES
Resistant to impact and shock damage from drops or physical trauma.
- Stress tests
-
Has undergone rigorous stress testing to verify durability claims.
Security
- PIN Protection
NO
Offers PIN-based access control to protect your seed phrase from unauthorized access.
- Encrypted Backup
NO
Supports encrypted storage of your seed phrase for additional security.
- Tamper Evident Seal
NO
Features tamper-evident sealing to detect if the backup has been compromised.
Capacity
- Multiple Private Keys
NO
Supports storing multiple seed phrases or private keys in a single device.
Backup Compatibility
- Output Descriptor
YES
Supports backing up wallet output descriptors that define how to generate addresses and spend funds.
- 12 Words BIP-39
YES
Supports backing up 12-word BIP-39 seed phrases.
- 24 Words BIP-39
YES
Supports backing up 24-word BIP-39 seed phrases.
- Seed QR
NO
Supports backing up seed phrases encoded as QR codes.
- Shamir Backup SLIP-39
NO
Supports backing up Shamir's Secret Sharing scheme (SLIP-39).
- Hexadecimal Strings
NO
Supports backing up hexadecimal strings.
- ASCII Strings
NO
Supports backing up ASCII text strings.
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SeedHammer II vs the competition
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