Even though somebody may have a really good grip and may release the head of the club at the right time, they still might slice because as they release the head of the club they release their hands in what we would call an underhanded or reverse position. What should happen is that as you come back to impact your hands should rotate into a position where the back of your left hand is facing towards the target. If you come in and the back of your left hand is facing towards the right the ball is going to slice. I have a drill that will help you get rid of this reverse roll position. It is called the wristwatch drill. What I would like you to do is to key on the face of your wristwatch. As you make your backswing try to feel like your wristwatch is on a 40-five degree angle to the ground on the backswing facing up towards the sky. As you come through you want to rotate that wrist watch so that it makes a complete 90 degree turn so that it is facing 40-five degrees down to the ground on the follow-through. This rotation of the wristwatch will square the clubface for you, thereby helping you to reduce or eliminate that slice.