This is another simple tool to squeeze a toothpaste tube or something else.It's better to print the roller vertical without support but with a grid on the ground. Look, that the slicer don't correct the little hole in the second part (print without automatic correction). Fit both things together, it will make a "klick". The second part is a little bit thicker (0.1mm) to fit well in the other part. You can also use a litte superglue. As an option, you can print the tool at once, but its more difficult for the printer.