Picks are usually made of plastic and come in a variety of different shapes and thicknesses. Most bass players prefer a medium or thick gauge pick, as thin picks tend to give a less defined sound.
The pick is held between the thumb and index finger, as illustrated in the photographs below:
Many heavy metal bass players use this picking grip.
Play each note in Examples One to Four using a downward pick motion. Use only the tip of the pick. When playing with the pick move your hand from the wrist. Do not keep it rigid.