The Vevor ladder leveler is designed to help stabilize ladders on stairs, curbs, and uneven terrain. Its heavy-duty carbon steel construction supports up to 550 lbs for dependable performance on demanding jobs. The adjustable design and locking plate make leveling simple, while anti-slip rubber feet improve grip and safety on a variety of surfaces. It is compatible with fiberglass, aluminum, telescopic, and straight ladders. This permanently fixed 20-inch model is built for reliable indoor and outdoor use.