Extension ladders are versatile tools used for reaching high places safely. They consist of two or more sections that can be extended and locked into place, allowing users to adjust the height as needed. Made from materials like aluminum or fiberglass, these ladders are lightweight yet sturdy, making them suitable for various tasks, such as painting or roof repairs. To use an extension ladder safely, it’s important to set it up on stable ground and ensure it is at the correct angle. Users should always follow safety guidelines, such as maintaining three points of contact and wearing appropriate safety gear while working at heights.