When I turn the dial to zero and turn the butterfly knob, it is no longer springy and is loose. Quick and quiet RFID (radio frequency identification) personal safe when you need it most.2 Remove one (1) 9-Volt Alkaline battery and replace with new one. Then, take this and attach it to the gun safe.Some digital safes use a combination of a standard number of letters or even characters.Found at: Costco in Redwood City, CA (2300 Middlefield Rd. CAUTION! Remove the key after closing the door and keep it in a secure place. Both key and combination are necessary to open safe. I tried the default combo (1-2-3-4-5-6) without success. It goes without saying that it is a safe that uses some type of combination to permit entry, but this does not mean that you have narrowed down which type of safe it is.Please refer to your specific set of instructions. Other safes allow you to program a combination of two to ten letters and numbers. There are better safe brands made in the U. 4 INSPECTING YOUR SAFE Make sure to inspect your safe for shipping damage as soon as you receive it. Heritage safe combination instructions Look for a removable.