How to add Brushes?

How to add working brushes for sculpting? I’ve made over 10 different brushes 7 with a black and a white brush area. I also made a alpha transparent with a white brush spot in the middle. What else would I need to do, to get the brushes enabled correctly in sculpting?

Thanks!

Do you mean you have those brushes and wanted to save them as default, so that every time you start Blender your brushes are ready there for you?