The RAU102 is used as a sheet metal bender, especially for valleys and panel bending.
To use: Insert the metal into the jaws of the tool to the desired depth. There are stops on the sides of the tool starting at 2 1/2” and ending at 13 1/2”. Metal can be bent to a lesser depth but would need to be measured by hand. Once the metal is at the right depth, pull on the yellow handle and that will shut the jaws onto the metal securely. Lift up on the tool to bend your metal to the required depth.