MOVES LARGE AND HEAVY OBJECTS MORE EASILY!! Employs principle of leverage it makes the item being carried seem 66 percent lighter!! Heavy Duty Up to 800 pound!! Ergonomic Design to encourage proper lifting techniques and reduce back injuries!! It is highly adjustable to fit all sizes!!EASY TO MANEUVER!! Going up and down stairs, turn corners!! SAVES YOUR FLOORS from scratches, dents, scuffs by lifting up!!