Steelwallet can be purchased at This is the same center punch style as Blockplate but slightly smaller and a fraction of a millimeter thicker. Appears to be by the Shift Crypto team, creators of the BitBox hardware wallet. Claims to protect “against fire, water, electrical-shocks, corrosion and pretty much any obstacles nature throws at it.”


Using the center punch went smoothly and quickly.

Heat Stress Test

Same as blockplate — highly readable.

Corrosion Stress Test

No data loss.

Crush Stress Test

No data loss.