Bona Certified Craftsmen are hand-picked, proven, top level professionals, trained and certified by Bona that use the complete Bona System on your hardwood floors. These individuals are devoted to Bona product systems; they voluntarily undergo continued Bona training to keep up-to-date on the industry’s “best practices” and are rigorously tested by Bona to ensure the most beautiful and durable results possible for your hardwood floors.