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.