Using the Condux 08072550 Mini - Cobra Duct Rodder is straightforward. First, take the rod out of the 24' cage. You can then attach the male end fittings and tapered heads as needed for your small duct or short - run project. When using, make sure to handle the rod gently to avoid kinking. After use, wind the rod back into the cage neatly. Keep the rod in a dry place to prevent rust. If you need to replace parts, the replacement part number is 08073750.