This drill teaches players how set traps againist the ballhandler in a game like situation.
This drill also works on ball handlilng againsit traps or 2 on 1 situations.
This will also work on defensive communication when setting trap.
Communication
Good team defence is five players guarding the ball, not five separate one-on-ones. The shell drill is where that starts, so here is how to teach help-side positioning and rotations from the first week of the season.
Rebounding is the least glamorous thing in basketball and one of the most decisive. It is also almost entirely a habit, which means it is entirely coachable.
Good spacing is only the start. The best modern offences teach players to attack the defence's rotations and play in a permanent 4-on-3 - here is how to coach that read.