Roasted Coffee Roasters from Brno Rusty Nails . At Rusty Nails he believes that roasting coffee is about philosophy . it is an attitude. Attitude to the product, the environment and the customer itself. The goal is to only directly acquire and care for the best coffee beans with a focus on sustainability and traceability. Roasting is rather lighter in order to highlight the original authentic character of coffee.More about the products in this section.