This hardware kit allows you to create a Bi-Fold hidden door that can be used to conceal a safe room, wine cellar, or man cave. This InvisiDoor kit is designed to mount in front of a closet or hidden room. This door is designed and built by CSH in America. This InvisiDoor kit is designed to mount in front of a closet or hidden room. This door is designed and built by CSH in America.