SteelQR – C12
The SteelQR C12 can secure your 12 word seed as a compact QR-code on 3mm thick 316L stainless steel.
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.