A hydraulic spreader looks like two large metal fingers pressed together. They come together with a thin tip at the end that can be inserted into narrow spaces. The tool then uses hydraulic power to spread the fingers, pushing apart the metal panels (Flanges). Place the Prime Hydraulic Flange spreader tool into the access gap, with the full width of the selected step fully inserted up... https://www.primetoolsindia.com/hyd-flange-spreaders.php