Grab two rimmed plates and place them next to one another with their smooth sides facing outwards. Use your fingers in order to grip one side of the plates with your thumb on the other side so that you are holding the two plates together. Squeeze the plates with your finger and thumb while you are in a standing position and hold the position for as long as you can. Repeat for the prescribed number of sets and be sure to switch arms so that you are training each of your forearms evenly.
Be very careful when performing this exercise. If you attempt to hold the weighted plate apparatus for too long, you may drop the weights, which could potentially result in injury. If you, at any point, feel as though the weights may slip out of your grip, slowly bend your knees and place the weights on the ground.