GolfJOC Power Lag Pro + Flat Wrist Pro Trainer Promotes proper lag for power and consistency. Improves ball compression and increases distance. Fixes slice and over the top move. Prevents casting of the club. Promotes flat wrist through impact. Develop proper hand position before, at and post impact. Fixes breakdown of the leading wrist and arm at impact. Improves consistency and ball trajectory. Learn to hit down on the ball like the pros do. Hit crisp chip shots.