Coldbit Steel



  • stores up to 24 words (each word up to 8 letters)
  • extra line that can store up to 16 letters for Wallet ID (recommended) or BIP39 passphrase
  • 2 stainless steel plates – heat and corrosion resistant (AISI 304)
  • 4mm thick stamping plate and 2mm thick cover
  • 2 nickel binding posts (countersink hole on the back – the wallet lays flat on the table)
  • no loose parts
  • metal box
  • additional testing plate to practice stamping and provide support

Coldbit Steel is a durable solution for your Bitcoin seed backup.

Made of 4mm thick stainless steel plate, a 2mm thick stainless steel cover and 2 nickel binding posts.

It’s designed to withstand house fire, flood, electrical shock, extreme temperatures (up to 1200 C) and humidity (corrosion resistance).

Compatible with any 24 or 12 word seeds (BIP 39) and wallets (eg. Trezor, Ledger, Electrum, Jaxx and many others).

IMPORTANT: Please don’t forget about ordering the stamp set and the hammer – they’re sold separately.

Additional information

Weight 0.3 kg
Dimensions 10 × 6 × 0.6 cm
  • Magnusson Club Hammer


    1.5 kg / 3.3 lbs. club hammer.
    Ideal for stamping letters on metal plates.
    Comfortable fibreglass grip.

  • A-Z Letter Stamp Set


    Stamp set that includes all letters from A to Z.
    Each letter is 3mm high.
    Made from tool steel in Germany.