Hi Sergio
Try this simple drill
Leadbetters pump drill
Take your normal set up and address the ball with a 7 iron. now slowly ( and i mean slowly ) , move your club away to the top of your backswing.
Start the downswing and maintain your wrist cock until you feel your right elbow touch your side, just above your belt line. hold this position for a count of three and then take your club back to the stop of your back swing. Start the down swing again and keep your wrist cock until your right elbow again touches your side. hold for a count of three and really get a feeling of this position. Now go back to the top of the back swing and then swing through to a full balanced finish.
This excercise must be done really slowly until you get a feel for that delayed release and then you can start to speed things up.
cheers
