These stool's are tried and tested and can deal with rough flooring much better than the stools at your local hard wear stores. There are 4 large casters that can move easly over rough flooring. The two type we have are the RED and Black which has a tougher leather and has a handle cut into the back of the Chair, And the flat Black. Apart from the longevity that these seats give in comparison to the more common seat, they have some addition feature. Because the seats have a back opposed to the common round seat stool the leaver to raise and lower the seat is always on your left hand side, The padding gives for a much more comfortable seat. It also has the option of a tray that can be used to hold hand pieces.