002 02 Replacement Key for WD2 MODEL HD2100 Sentry Safes 2 sided. This is a code 002, 02 double sided Sentry key for Sentry Model WD2 HD2100 Safes. Key will be cut and ready to work in the lock. If you have the original key, the head will be shaped in the traditional Sentry pattern. This key uses a substitute key blank that needs to be trimmed at the end. Key will come cut and ready to work in the lock. An example of this type of key is shown. YOUR KEY WILL NOT LOOK LIKE THE ORIGINAL. These have to be hand cut and trimmed because there is no direct key blank available to make a duplicate. Your Sentry Box should look similar to the pictures below.