When used correctly the little giant classic is the strongest safest most versatile ladder in the world the classics patented triple lock hinge and telescoping sides make it a true multi use ladder in fact the classic can be used in 16 unique configurations as an a frame extension staircase as a 90degree ladder and as a trestle and plank scaffolding system you will enjoy an unmatched feeling of safety and stability using the little giant classic ladder constructed of heavy wall a