This is an optional step. If you are using a customized toolkit, jump to Step 7.

Download the model files for 1st Bottle Opener.

Import the file to PrusaSlicer.

The nut side should lie on the build plate. If not, change the print orientation as shown in image 1.

In the bar on the left, use Paint-on supports function to paint support areas inside the nut part, as shown in image 2. Then, select For support enforces only for Supports.

Click Slice now. If set up correctly, you should see the similar support result shown in image 3.