Stack-On 36-Gun Safe with Electronic Lock FS-36-MB-E lock includes operational lights for open, low battery warning and incorrect entry. There is a time out period after 3 incorrect attempts. Batteries are accessible from the front of the safe and are easy to replace. A drill resistant, hardened steel plate is located behind the lock for greater security. A trouble key is included withthe Matte Black Stack-On Electronic Gun Safe. 2-way locking with 1" steel live action locking bolts5 locking points. Live action locking bolts are extended and retracted by rotating the steel handle. This Fire Resistant Stack-On Security Safe includes a removable shelf. Shelf is positioned in the front of the unit so longer guns can be stored along the back wall. Safe holds 8 firearms up to 54" tall.