drill_params

      "drill_params": [

    {
                    "type": "UINT",
                    "field_length": "0"
                },
                {
                    "type": "UINT",
                    "field_width": "0"
                },
         {
                    "type": "LIST",
                    "form": [
                        "circle",
                        "triangle",
                        "square"
                    ]
                }
            ]