22', Articulating Ladder, Strong, Safe, Versatile, Innovative Features Dual Pin Hinge & Easy To Use Rock Locks For Quick Adjustment, Tip & Glide Wheels Make It Easy To Move, Can Be Used In Many Unique Configurations Up To 33, A-Frame, Extension, Staircase & 90 Degree Ladder, Velocity Trestle Brackets Sold Separately To Form A Trestle & Plank Scaffolding System, Constructed Of A Special Alloy That Makes It 20 % Lighter, Wide Flared Legs, Aerospace Grade Aluminum Construction Provide An Unmatched Feeling Of Safety & Stability, Rated To Hold 300 LB On Both Sides, 2 Person Ladder.