Portable security gates expand to restrict access, then fold up and roll away when not needed. Gate is constructed of 15-ga. heavy-duty steel U-channels that are riveted back to back. Stanchions have tubular design with 3" rubber casters. Padlock hasp on right side of unit keep gate locked when closed. Begin with starter unit and add-on as necessary. Starter unit has (2) sets of casters and is 15"W when closed, 12'W when fully expanded. Add-on unit has one set of casters and is 11"W when closed, 6'W when fully expanded. All units are 78"H. FOB IL. Made in USA.