The Hook Panel Removal Tool, item 7129, for perforated or unperforated panels, is inserted into the joint between two panels. Make sure you insert the tool within 1" from a panel intersection to grab the correct part of the panel. Twist the tool 90 degrees to hook the top of the panel. Then pull the tool downward, slowly, until the spring catches on the flange of the grid and can be seen. Now that the spring has become accessible, push the spring together, slide it down through the slot, and pull down gently to release the panel from the main beam.