How to use Kingrack Metal Clothes Drying Rack? 1. Open the package, make sure the all the components(main frame, 4 wheels, 4 hooks) are intact. 2. Distinguish the outer frame and inner frame. 3. Make sure the 2 short wheels with locker are install precisely on the outer frame. 4. Make sure the 2 long wheels without locker are install precisely on the inner frame. (When you install the wheel in position, you will hear a loud and clear voice