Ultimate Spy Vault & Code KitAssemble a double security lock with a combination code and key to hide your most prized possessions. Then use the included buzzer and electronic components to build a really working door alarm or pressure plate to keep your valuables from prying eyes. With easy to find materials from home and our step by step instructions in the book, you'll find even more spy activities such as dusting for fingerprints, encrypting and decrypting codes, making