Nine inch storage shelves are spaced and constructed in a practical way. It shows the right screws. This requires a drill some wood. The viewer is shown how to make a good back brace for the shelves. It shows how to make the shelving unit level. You learn the screw head must be flat. You are also shown how to put in a good support for underneath the shelves. It shows the center support being constructed. He shows how to set the shelves up so there is support from all sides and to make the shelving unit sturdy. He shows how to add even extra support. He shows how to put an endcap so the shelves look complete and finished. He finishes by showing that it is strong and can hold a lot of weight.