SteelQR – C12 Card

The steelqr C12 Card is a 1mm strong credit card sized SteelQR you can carry in your wallet. It is the ideal item for quick Bitcoin shills and effective physical onboarding. The C12 can secure your 12 word seed as a compact SeedQR. Due to the thickness of 1mm it is less mechanically durable than the 3mm strong C12 and C24 SteelQRs but very lightwheight and extremely portable.

The SteelQR C12 is a storage solution made of military grade 316L stainless steel designed as a free and open source hardware product under the GPLV3 licence. Its purpose is to secure your 12 word Bitcoin backup words (mnemonic seed phrase). Your seed can be encoded as a QR-code using a SeedSigner signing divice and stamped on the SteelQR with a automatic center punch.