The Leveler can be installed on almost any fiberglass or aluminum extension ladder. It can also be operated using only your foot — freeing your hands to hold the ladder.
From the Manufacturer
The Louisville Ladder LP-2220-01 Levelok ladder leveler kit easily attaches to fiberglass and aluminum extension ladders for even support on uneven surfaces. Extends up to a full 10 inches, perfect for steps. Large heavy duty swivel shoe with spurs for even support on uneven surfaces. It will not decrease the duty rating of your ladder, and it includes two levelers for each rail of your ladder and instructions. Tools required for installation is a drill, 11/32″ drill bit, 5mm allen wrench and 1/2″ wrench. Compatible with Louisville ladder fiberglass series FE1700, FE3200, FE7600, L-3022-PT and FE4200HD. Also compatible with aluminum series AE3200, AE2200, AE2800, AE1200HD, AE1200 and L-2094.