All players are partnered with another player across from them. So in this case the numbers are partnered with the X-numbers. The two balls in the drill must travel in the same direction. Once the ball is passed, the players must sprint to change places with their partner.
This drill can also be done in a full court situation:
Once your players know this drill, they will sprint to the half court positions! You can assign where your guys go and change it up every time.