Z-Ceiling signs are a great space-saver as they hang from the ceiling tiles. Made from 35 mils thick aluminum, the signs are double-sided so they can be spotted from both directions. Install the drop ceiling "Z" signs in seconds. Unlike wall or door signs, these signs don’t require any special tool for installation. The sign's flange fits between your ceiling tile or ceiling grid, found in most offices. Unique bent "Z" design snugs firmly into the built-in track of your ceiling. To install, just lift up a ceiling tile, rest the sign on the grid, and lower the tile.