SteelQR – C24
The SteelQR C24 can secure your 12 word seed as a standard generically readable QR-code on 3mm thick 316L stainless steel. Optionally it can secure your 24 word seed as a custom compact QR-code format supported by SeedSigner or Blockstream-Jade.
The SteelQR is a storage solution made of military grade 316L stainless steel designed as a free and open source hardware product under the gplv3 license. Its purpose is to secure your 12 or 24 word bitcoin backup words (mnemonic seed phrase). Your seed can be encoded as a QR-code using a SeedSigner signing device and stamped on the SteelQR with an automatic or manual center punch.