Metal Surfaces Brushes and alpha set for Zbrush, 4 brushes and height/alpha maps, all 2048x2048.

Artstation Profile

https://www.artstation.com/artist/fredo

(free to use for commercial use)

Personal License:

For Freelance and small indie teams with up to 10 people.

Studio license:

For teams with more then 10 people.

***Once the brushes are adquired, they can be used for personal or comercial projects, regardless the company that the final project is aimed.