Remove the shelf from your Whirlpool refrigerator if it is still in place.
Clamp the pliers onto the shelf pin and turn it half a turn in a counterclockwise direction.
Pull back on the pliers while jiggling the shelf pin until it pops out.
Push the new shelf pin in by hand and then clamp the pliers onto the shelf pin.
Turn the shelf pin clockwise until it rests in a horizontal position.
Pull on the shelf pin, with the pliers, to ensure it is secure.
Replace your Whirlpool shelf.