Billfodl is the safest way to keep your crypto wallet backup offline, safe from the hackers and other natural disasters. Fireproof, waterproof, and shockproof. You create your recovery phrase on an indestructible stainless steel. Because it is laser engraved, your recovery seed is written onto the character which is permanently burned into the stainless steel and is more likely to retain its structure in the event of a fire. To be used for CoolWallet products only.