Running boards

The running boards on my 4runner are falling off due to rust. I'd prefer to make my own rather than buy new ones for practice and a cool project. What kind of tool would I need in order to get raised holes in them like this?

https://preview.redd.it/t7u6ngh01jke1.jpg?width=736&format=pjpg&auto=webp&s=8fa5063de67f78b00844590de0e8a3f3ecd3fb43