On the golf course, hitting the ball straight is the hardest thing to fully master. In golf, you swing a club face that has grooves on it. A great majority of amateur players swing the club head at an average of 80 miles per hour. For such a golfer to get a straight hit on the ball, the club face has to make impact with the ball at the precise spot each time. Otherwise, the result will be the ball spinning to the side, causing the golfer to hit either a slice, a fade, or a hook.