Welcome to the forum.
There are lots of ways this could be done.
If you look at the image you will see that I have chosen an isometric perspective,
and clicked on the end face of the ROD, it is not a pipe, as it has no hole.
Having clicked on it, there is a small blue grip which I have circled in red.
You can click on that and pull it in the direction of the arrow to lengthen this extruded solid shape.