Divide the team into 2 groups and form 2 lines on opposite sides of a base facing each other 12 feet from base.
First player in both lines starts running at the base at the same time.
The runners hit their respective inside corner, turns left and runs approximately 12 feet and stops, turns and faces base and waits for the others to do the same.
Continue around each corner.
This drill works on hitting the inside corner when running bases.
Emphasize exploding off base as they round it.