The GanCraft Jointed Claw is the most popular "S" style swimbait in Japan.  These baits are designed to be retreived slow and steady, so the design of the bait will allow it to swim in perfect "S" style movement.  GanCraft discovered years ago that big fish react to a slow "S" style movement more than any other movement, and they have developed the best baits to mimic this action.