Complete the Wall Mount Delivery Top Vault with the Wall Mount Delivery Bottom Hold. The unit fits between wall studs (16 in. centers) for easy installation in any stage of construction or remodel. The rear entry, key locked Wall Mount Delivery Bottom Holds constructed from heavy duty 16 galvanized gauge steel with a durable black powder coated polyhammer finish. The Bottom Hold may not be necessary for garage mount or other similar installations where deliveries would simply fall to the floor in the interior of the structure. However, the Bottom Hold is recommended for residential, office or commercial installations for additional security purposes.