Blocking is a very useful tool in volleyball, because it serves as an obstacle for the offensive hitter and helps aide in defense.  Blocking allows a portion of the court of be taken away from the hitter and allows the defense to play more court because that area is shut off.  To successfully block the hands and arms have to penetrate and seal the net creating a wall for the hitter to work around.  If there are two blockers the outside blocker, the one closest to the line, angles his or her hands so that the hitter can not knock the ball off their hands and out of bounds. 

The hands on a block should have the fingers spread far apart and the thumbs should point towards the ceiling, maximizing the amount of area occupied and putting the strongest jointed finger directly in front of the ball.  A blocker doesn’t have an approach for jumping they are located at the net and jump straight up, reaching up and over the net to try and deflect the hit from the opposite team and direct it back into their court.