The John Boos X-0421A features corner rods that are expertly welded in the sink bowl corners, designed specifically for flush-mounted poly sink covers (covers sold separately). This customization ensures a seamless fit and enhances the functionality of your sink setup. Ideal for professional kitchens, the modification provides added durability and stability, making it a practical choice for any culinary environment. Each bowl is tailored for optimal performance, ensuring your workspace remains efficient and organized.