On these devices , a miniature laser is mounted just atop the putterface pointing square ahead .
On these devices , a miniature laser is is turned on by pressing a button on the grip only after the golfer decides he has done his best at aiming the face .
On these devices , a miniature laser is mounted just atop the putterface pointing square ahead and is turned on by pressing a button on the grip only after the golfer decides he has done his best at aiming the face .