We have SDB-300-E Electronic drop box with Product Detail 1/2" solid steel hinge, Dead bar to prevent removal of the door Easy to program electronic cam lock, 2 AAA batteries (included) 1/2" Slot opening above formed door Saw-toothed baffle to protect slot 4 Pre-drilled mounting holes on bottom . The "SDB-300-E Electronic drop box" is best product for you. We recommended SDB-300-E Electronic drop box