Ladder Levelers. Unlike most leveling devices, the Xtenda-Leg offers an unlimited range of adjustability. Fully extended, it can support an 800-pound load, says the maker. It’s designed for use with Type IA, I, and II ladders up to 32 feet long. Model 600 ($85) has rubber feet for use on firm, nonslippery surfaces, and model 700 ($95) has metal-cleated feet for use on soft ground. Interchangeable replacement feet are also available. CE Tooling, 702/736-2958. ladderlevelersllc.com