The Yo-Zuri Wack"O" is the Cadillac of Yo-Zuri Topwater Hardbaits. Yo-Zuri Patented Tungsten Weight Transfer System for super long casts! The Tungsten ball rolls to the tail during the casts for added weight for really long casts. On the retrieve the magnet pulls the ball back and locks it in place. Unlike other weight systems, this stops the ball from rolling freely around and effecting the action of the lure.