Ladders are commonly used tools that consist of a series of rungs or steps that are arranged between two vertical rails or sides. They are typically made of materials such as wood, metal, or fiberglass and come in a variety of sizes and shapes for different uses.

Ladders are used for a wide range of applications, including construction, painting, cleaning, and maintenance tasks. They can be portable or fixed in place, and some are designed for specific tasks like roof work or tree trimming.

While ladders are useful tools, they can also be dangerous if not used properly. It's important to follow safety guidelines when using a ladder, such as inspecting it for damage before use, placing it on a stable surface, and using proper climbing techniques.