Dynamic Kettlebells are precision machine molded as one solid piece of cast iron, ensuring that dimensions and weight are more accurate than traditional kettlebells on the market. They feature Black Tex powder coating - a great gripping surface and the most durable and long lasting form of kettlebell finish available. Traditional kettlebells are made using putty to smooth the surface, making them prone to chipping. Dynamic Deluxe Kettlebells use precision casting which provides a fine, natural, smooth surface. Colored emblems & bands on handles easily identify the weight in both Kilograms and Pounds.