Up to 30 feet: Includes one high quality synthetic brush head and 18 piece flexible durable rods that extend up to 30 feet.Easy to Use & Effortless for Good Cleaning: dryer vent cleaner kit can be used with or without any kind of power drill and will help you achieve professional results. Just always turn the rod clockwise and keep moving in&out slowly. Kindly remind that while cleaning around corners and turns or stubborn lint trap, slow down and then accelerate slowly..Improve Dryer Work Efficiency: A drill attachment included. Perfect for improving cloth dryer work performance by using our dryer vent cleaning kit to clean the build up lint and dust in dryer vent, duct and exhaust port..Save Your Money：No need to pay a professional service cost $150 per cleaning when you buy our Dryer duct Cleaning Kit ..Preventing fire risks: Lint buildup can be dangerous and failure to clean it is the leading cause of clothes dryer fires. So remove the lint periodically is the only way to prevent dryer fires risk.