It is one of several ways to get into promenade position and is used to turn dancers around corners or change their direction on the dance floor.
There is a sway to the left from the man's point of view, starting on the second beat.
It is very similar to the basic whisk except that it progresses backward rather than forward.
One begins in promenade position with the couple moving forward on the first beat.
The second starts in closed position with the man moving backward on the right foot.