Compatible with most makes of extension ladders (aluminum/fiberglass/wood), the easy-to-attach, lightweight Basemate Ladder Stabilizer is designed to equalize uneven terrain with the tap of one's foot, reportedly grounding the ladder as firmly as if on a flat surface. The arc-shaped Stabilizer also provides a wider, more stable platform. As the locks on each side are released, the arc slides over until its rubber-tread feet are firmly on the ground while the ladder stays plumb. This hardened-steel device is weight-tested to 1,200 pounds.