Werner PK80-2 Master PK80 Automatic Ladder Leveler with Safety Shoes, Silver N/A Imported Automatic leveler for all Werner fiberglass and aluminum D5900, D6000, D6200, 7100, D7100, D1100, D1200, D1300, D1500 and D500 series ladders Automatically adjusts up to 8-1/2-inches Easily levels and locks securely in place The width of the ladder is increased by approximately 3-3/4-inches The ladder's duty rating will remain the same after proper installation of levelers-one for each ladder rail