FAQs

Coldbit is a metal backup of your Bitcoin/altcoin wallet seed. You can stamp your wallet seed words on Coldbit's metal plates and store safely for long periods of time.

Coldbit is for individuals concerned about the long term safety of their wallet seed who are not afraid of swinging a 1.5kg (3.3 lbs.) hammer. It is for people who would rather not worry if their seed words might scramble if a heavy log hits the wallet during a house fire.

Coldbit is made of 2 stainless steel (AISI 304) plates. In addition to iron this type of alloy contains 18% chromium for oxidation and corrosion resistance and 8% nickel. The plate on which you stamp your seed words is 4mm thick so that it provides plenty of protection surface for your seed. 4mm means it will not deform when you stamp 24 words on it. It is much harder to bend or break a 4mm thick plate than a 1mm plate (which is closer to what most other cold storage wallets offer these days). The covering plate is 2mm thick. Both plates are secured using 2 nickel binding posts and placed in a metal box.

The melting temperature of AISI 304 steel is 1450 °C (2642 °F). However the highest temperature at which the stamped seed is still visible is closer to 1200 °C (2192 °F). The average house fire temperature is about 600 °C (1100 °F) which means Coldbit can handle 2x the temperature of a house fire. You are very unlikely to find a safe that guarantees withstanding this temperature.

Coldbit metal plates and testing/supporting plates are manufactured in Poland. The letter stamp sets and metal boxes are made in Germany. All our suppliers are either Polish or German.

If you can swing a 1.5kg (3.3 lbs.) hammer yourself you can stamp your seed. Every Coldbit wallet comes with a testing plate that lets you practice stamping before you stamp the actual seed.

To stamp the seed you need the Coldbit metal wallet, a letter stamping set (A-Z), a hammer (1.5kg is ideal but 2kg and 1kg will also work), a testing/supporting plate that lets you practice and acts as a support for the wallet during stamping (it's included). You can order it all in our online shop. You also need some kind of a flat, solid and stable surface that can withstand the hammering. A garage table or a piece of concrete (sidewalk or stairs) will work fine.

Stamping 24 words usually takes about 30 minutes. With enough practice you can do it in 15 minutes.

An alternative to stamping is engraving with a Dremel tool. We regard stamping as a superior method to any other method because it creates the deepest marks in the metal. The deepest marks mean the longest time it survives. Engraving with a Dremel doesn't create marks as deep as stamping but is still superior to eg. laser etching (not to mention paper storage) so engraving can be considered in case you want to avoid stamping. We do not offer a Dremel engraving tool in our online shop though. You have to find it elsewhere.

We accept Bitcoin payments (both on-chain and over Lightning Network) and regular credit card transactions. We use BTCPayServer to process Bitcoin transactions and Braintree to process credit card transactions.

Bitcoin Lightning Network on mainnet is in the early stages of development. Channel liquidity is relatively low and there are few nodes that support routing of mid/high value transactions. Sending/receiving 0.02 BTC via Lightning is a challenge these days but sending/receiving 0.005 BTC works most of the time. However things change rapidly and situation will improve with time/effort and capital people invest in the Lightning Network. That being said if you want to pay for Coldbit wallet via Lightning the most reliable recommendation we can give is "connect to our node with enough channel balance to cover the payment". 0.02 BTC is a good start, you should increase it accordingly to your sending/receiving needs on the Lightning Network. Our node is here: 02b37a7de2b3a6b4b04485a2a6eba03feff0d5d34813a0401d09fbcbfedfbb1a1f@emfvjnjghqjv5bn6lqcgvaushuj4ldqjtgcuejj73yvwkq5dj2scavid.onion:9735

We ship using FedEx. All packages are insured. We provide tracking numbers.

Between a few days to a couple of weeks. You can see estimated delivery time when checking out.

You can add the products you need to the basket and then go to "Checkout". Fill in the shipping and payment information and proceed to the payment. If the payment completes successfully you will be notified by email about the status of the order. In case of any problems with the payment feel free to contact us at support@coldbit.com

If the order hasn't shipped you can cancel it using a link you'll receive. If it has shipped but you want to cancel you will first need to return the product to us and we'll refund you order upon receiving the product.

You don't need an account but you do need to leave the shipping information. If you're concerned about your privacy and don't want to leave shipping info in our system please contact us at support@coldbit.com

You will receive a link with order tracking upon completing the purchase.

You can return the product if it hasn't been used that is the metal plates don't have any letters stamped on them. You can return the stamp set and the hammer provided they've not been damaged in any way.

We understand you might be concerned about your personal data (name, address etc.) and might not want to leave this data when placing the order. However we need the shipping information to be able to send the product. If this is the case please contact us at support@coldbit.com

Yes, you can request it. Contact us at support@coldbit.com