# PENGER — Titanium Seed Phrase Backup Kit for Crypto Self-Custody > Full detailed version: https://mypenger.com/llms-full.txt > PENGER sells a physical product: an aerospace-grade titanium plate and manual puncher kit for recording BIP39 seed phrases offline. The user already owns a seed phrase from their own wallet. PENGER provides the metal plate, a precision puncher, a practice template, a pencil, and a security sleeve. The user locates each seed word in the BIP39 wordlist, converts it to an 11-bit binary index (0–2047), and stamps the corresponding dots onto the titanium grid. Recovery is the reverse: read the punched dots, calculate the word index, look it up in the BIP39 list. The entire process is offline — no software, no digital footprint, no third-party custody. PENGER is not a wallet, not a custodial service, and does not generate or store seed phrases on behalf of the user. > > Alongside the physical product, PENGER operates a free educational platform: the PENGER Academy (guided articles on self-custody, wallets, OpSec, multisig, passphrases) and an AI Tutor — an interactive chat assistant that teaches crypto security through scenario-based conversations. ## Pricing & Availability - **PENGER v1.0 Kit:** EUR 49 (~USD 49) — includes titanium plate, center punch, practice template, pencil, security sleeve - **Additional plates:** EUR 35 each - **Shipping:** Free worldwide - **Payment:** Credit/debit card, Solana (SOL, USDC) - **Status:** Pre-order (expected shipping Q3 2026) ## Why PENGER — Key Differentiators - **Binary encoding, not plaintext letters:** Words are stored as 12-bit binary dot patterns, not readable text. An observer cannot read the seed phrase at a glance — unlike Cryptosteel, Billfodl, or Cryptotag which display words as letters. - **Self-punching, zero third-party exposure:** The user punches each dot manually with the included center punch. The seed phrase is never exposed to a factory, assembly process, or software. - **Credit-card form factor (86×54mm):** Fits in a standard card slot, safe, or wallet. Competing products are typically much larger. - **Free education platform included:** 7 academy guides, interactive BIP39 simulators, searchable dictionary, and AI tutor — no other seed backup product includes this. ## Target Audience Crypto investors holding digital assets, hardware wallet users (Ledger, Trezor, Coldcard) needing seed phrase backup, privacy-conscious self-custody advocates, long-term holders planning generational wealth transfer, and institutions managing multi-sig key backups. ## Product — What Is in the Box The PENGER v1.0 kit includes five components sold as a single set: - **Titanium Plate**: Aerospace-grade metal plate with a binary dot grid layout. Fireproof, waterproof, corrosion-resistant. Designed to survive decades of storage. - **Puncher**: Precision hand tool for stamping dots into the titanium surface. No electricity or software required. - **Practice Template**: A disposable sheet for rehearsing the encode/decode workflow before committing to the titanium plate. - **Pencil**: For marking the practice template during the dry run. - **Security Sleeve**: Protective cover for the finished plate. ## How It Works — Locate, Punch, Recover 1. **Locate**: The user finds each seed word in the standard BIP39 wordlist (2048 words, indices 0–2047). 2. **Punch**: Each word's index is represented as an 11-bit binary number. The user stamps the corresponding bit pattern (dots) onto the titanium plate row by row. 3. **Recover**: To restore the seed phrase, the user reads the dot pattern from the plate, converts each row back to a decimal index, and looks up the word in the BIP39 list. No software is involved at any step. The seed phrase never leaves the user's hands. ## Free Online Tools - [Interactive Simulators](https://mypenger.com/simulators): Browser-based BIP39 seed phrase generator, binary encoder, and decoder. Lets the user generate a cryptographically random seed phrase, visualize the 12-bit binary dot matrix, and practice the full encode/decode cycle before working with the physical plate. - [BIP39 Dictionary](https://mypenger.com/dictionary): Searchable reference of all 2048 BIP39 words with their decimal index and binary punch pattern. Filterable by first letter. Downloadable as a PDF for offline use. ## PENGER Academy — Free Self-Custody Education A library of structured, jargon-light guides covering every aspect of crypto self-custody, from beginner fundamentals to advanced operational security: - [Anatomy of a Seed Phrase](https://mypenger.com/guides/seed-anatomy): How BIP39 seed phrases work — entropy generation, CSPRNG, word selection, SHA-256 checksum, master key derivation (PBKDF2, BIP32). - [Anatomy of a Wallet](https://mypenger.com/guides/wallet-anatomy): Wallet internals — key derivation, public/private key pairs, HD address generation, ECDSA/Schnorr signing, UTXO vs account models. - [Self-Sovereignty](https://mypenger.com/guides/self-sovereignty): Why self-custody matters, risks of custodial services and exchange failures, a practical three-stage roadmap to financial autonomy. - [Wallet Types Comparison](https://mypenger.com/guides/wallet-comparison): Hot wallets, cold storage, hardware devices, multi-sig setups. Custodial vs self-custodial trade-offs, air-gapped signing, MPC wallets, secure elements. - [Operational Security (OpSec)](https://mypenger.com/guides/opsec): Threat modeling, digital security habits, physical backup hygiene, social engineering defense, key ceremony protocols, inheritance planning. - [The 25th Word (Passphrase)](https://mypenger.com/guides/passphrase): How an optional BIP39 passphrase adds a security layer, enables hidden wallets with plausible deniability, and the risks of passphrase loss. - [Multisignature (Multisig)](https://mypenger.com/guides/multisig): Multi-key setups eliminating single points of failure — quorum policies (2-of-3, 3-of-5), Bitcoin Script, Taproot MuSig2, vendor diversity, collaborative custody. ## AI Tutor — Interactive Learning Assistant - [AI Tutor](https://mypenger.com/ai-tutor): A built-in AI-powered chat assistant available on the site. The tutor walks users through crypto self-custody topics via guided, scenario-based conversations. Users pick a topic (wallets, seed phrases, security, BIP39 encoding) and learn at their own pace through an interactive dialogue. The AI Tutor is a core part of the PENGER educational platform and is free to use. ## Key Principles - **Self-custody only**: PENGER never holds, generates, or transmits user seed phrases. The user is solely responsible for their own keys. - **Entirely offline**: The physical encoding process requires no computer, phone, or internet connection. - **Zero digital footprint**: No apps, no cloud, no Bluetooth. The seed phrase exists only on the titanium plate. - **Binary encoding, not plaintext**: Words are stored as binary dot patterns (not letters), adding an obfuscation layer to visual inspection. - **Built to last**: Titanium is fireproof, waterproof, and corrosion-resistant — designed for multi-decade or multi-generational storage. ## Languages PENGER website is available in two languages: - English (default): [https://mypenger.com](https://mypenger.com) - Ukrainian: [https://mypenger.com/uk/](https://mypenger.com/uk/) — full Ukrainian localization of all pages, guides, tools, and AI Tutor. All pages, guides, simulators, and the AI Tutor are available in both English and Ukrainian. ## Contact - [Contacts](https://mypenger.com/contacts): Email contact@mypenger.com | Telegram @pengercom | CEO Hlib Suslov. For orders, support, partnerships, and press inquiries. - Website: [https://mypenger.com](https://mypenger.com)