After learning how to make an open bridge, it is easy to change and form a closed bridge using the idea that a closed bridge is just like an open bridge but one with a loop. This loop is formed by your thumb and index finger and finished by the loop touching your middle finger. In order to form the bridge, start with a classic open bridge on the table and rotate your bridge hand slightly inward towards your body. With this rotation, your middle finger should now be where your index finger would normally be and the shaft will rest on top of it. Your thumb and index finger are now free to form a loop around the shaft and close the new formation.