Dundas Jafine's ProClean drill powered duct brush can be used to help remove lint build up and debris in your dryer duct and other general ducting. This product can be used manually or attached to a drill for increased power. This brush kit includes a 4 in Dia brush head and four 2 ft flexible rods that snap together and lock in place, providing a secure connection of the assembly while in use within the duct. The four 2 ft flexible rods can be used individually or attached together to extend the brush up to 8 ft in length, making it suitable for typical clothes dryer duct runs. The nylon rods are flexible which allow for easy 90 deg turns.