7-Inch Heavy-Duty Metal Wheels: This dry line marker is equipped with durable metal wheels, providing excellent wear resistance and load-bearing capacity. It maintains stability on rough or uneven surfaces, ensuring a smooth line marking process. The wheels are designed to minimize vibrations during movement, improving operational accuracy and reducing deformation or damage under heavy use 50 lbs Capacity: This field chalker has a 50 lbs material capacity. With a 2-inch line width, it can mark approximately 5066 ft; with a 4-inch line width, it marks about 2533 ft. The top lid helps keep the powder dry Versatile Application: Ideal for various sports fields such as soccer, baseball, softball, and tennis courts, this heavy duty steel chalker quickly and accurately draws clear lines, ensuring standardized and professional fields for training and competition