You control something with what touches it. Your hands are your only connection with the club. The more your hands become aware of and can control the face the better player you will be. Take a sand wedge. Place it in either hand. Take a ball in the other hand drop it on the face and try to bounce the ball on the face. Then change hands. Try to pick the ball up off the ground with the club head. Use two clubs and bounce the ball back and forth. Great for hand eye coordination.