Multiple start and end dates in one column

Hello Community,

I have the following problem:
In my data I have a column with several date values. I also have the column "Tool name". In order to create a Gantt evaluation, I would like to take the tools as the task and the MIN value of the date as the start date. The MAX value of the date as the end value. The problem is that PowerBI does not display overlaps correctly. I would need several start and end dates for a tool. So that I have two bars in one row of tools in the Gantt Chart. 

In the Gantt chart, I would like to have the red area hidden, so to speak, and have a continuous bar again after the red area until the end. So that there are no overlaps from tool 23 to tool 20 & 15.