The role of the base is used for fixed column,and the material is iron.It including an iron base plate and an iron connecting shaft. And the bottom plate is fixed with hexagon socket screws,it is ok to use the bottom part of the column set into the bottom of the step on the casing. Use of the three holes in the base: the side hole is the curtain frame program needs to be installed near the wall when used,and the corner hole is a curtain frame program needs to be installed in a corner of the place used.