I put this on the inside of the pantry door and it provides better organization and additional room in the pantry. You cannot mount this rack on a hallow core door. On my door, the side panels had solid material to screw into. There are 4 screws provided with 4 plastic sleeves to use on a dry-wall. Before ordering for a door mount, consider the type of door you have or replace the door. The rack provides a lot of storage. I wish it were made in USA.