LeveLok LL-STB-1AL Ladder Levelers Permanent Mount Style Aluminum with Stainless Steel Locking System - 2 Levelers

Installs on most aluminum and fiberglass, extension, combination and articulating ladders, rated up to 375 pounds. Locking system: Stainless steel, double-row ratcheting...adjusts up to 10” in 3/16" increments. Fully automatic, "back-up" safety lock...keeps leveler "locked" until weight is removed from leg. Heavy-Duty, double-claw, swivel shoes with auto-engaging safety-lock to keep claw in place. Special features...16d nail holes. Each kit includes 2 ladder levelers, hardware and instructions.