Swings 20 plus miles per hour faster than your own driver. * Activates the fast twitch muscle fibers through over-speed training effect. * Hear, See and Feel the proper release with the one-of-a-kind Magnetic Sliding Timing Ball: eliminates casting and coming over the top for the perfect release every time * Recognized by top players on the PGA Tour as the fastest way to increase club head speed. * Add 21-30 yards in carry distance with your driver after only 6 swings with the Speed Whoosh