When you offensive rebound you will not always be able to simply grab the basketball with both hands. That means that you can either try to slap the basketball out to another teammate, or tip it out to yourself so that you can grab the basketball with both hands.
For this basketball rebounding and finish drill you are going to practice tipping the basketball out to yourself and then attacking before the defense can get reset. Using this move can be a great way to score if you have mastered it. The key is really being able to sell the shot fake and then finish with contact around the basket. Even with a good shot fake the defender will most likely still recover and you will have to finish with contact. Basketball rebounding drills like this will train you to be aggressive on the offensive boards, and also how to finish when you do get the board.