In the furniture of the four corners into the furniture moving wheel, each moving wheel below the four small wheels, can bear 200 kg/440Lbs, so you can easily move furniture or heavy objects.60 Degree rotatable sliders, more flexible for moving,Surface Protection,Protective rubber tip won''t damage furniture.Material : ABS + High quality steel Wheeled mover roller.360 anti-skid pad, free to choose, easy to use.