The PiViT Ladder Tool requires no bolts or clamps, yet provides a safe, stable work environment. Moving from one ladder to another requires no special equipment. The PiViT Ladder Tool levels most ladders, works extremely well on uneven ground, and can be used as a ladder jack. The PiViT Ladder Tool is made of Polypropolene (the same material that a car batter casing is made from) and also uses a non skid material for the foot of your ladder to rest on and conveyor belt material on each corner of the PiViT to help minimize movement. The PiViT Ladder Tool supports up to 500 lbs. (227 kilos).