Little Giant Ladders Multi Aluminum 18-ft Reach Type 1A - 300 lbs. Capacity Telescoping Multi-Position LadderMaximum reach of 18 ft in extension ladder position (assuming a 5 ft 6 in person with a vertical 12 in reach) Multiple configurations, including A frame, extension, staircase or 90 ladder and trestle and plank scaffolding system The wide flared legs and aerospace grade aluminum construction provide unmatched safety and stability Features Little Giants new spring assisted Rapid Lock adjustments, which are easier to adjust than manual U locks Type IA