what is the reason for stoping face only one surface in forming tool?
i need two perpendicular stoping face.
Forming tools are used in sheetmetal parts which have a thickness (they are not surfaces). The stopping face aligns the forming tool with the sheetmetal face selected to insert the forming tool.
To add further what Tony explained, you can design your form tool in such a way that it will create the form on two perpendicular faces.
To add further what Deepak explained, you might find this thread useful:
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