This is an OEM part that is made of metal and sold individually. The leveling leg is generally used with refrigerators, dryers, freezers, ranges, cooktops, and microwaves. The leveling leg is meant to keep your appliance steady and level to the floor. If you notice your appliance is uneven to the floor it may need to have the leveling leg replaced. You will notice that the bottom of the leveling leg has a smooth surface to ensure moving your appliance does not require as much effort. This part screws into a pre-drilled hole underneath the appliance.