Most soft plastics do not require a swivel. If your swivel creates line twist, take care to straighten it out or change your line at the end of the day. There are, however, some notable exceptions. One is the Super Fluke, which is often fished on an 8- to 12-inch leader with a swivel connecting the two lines. Not only does the swivel add casting weight and keep the lure down, but some anglers believe it represents an even smaller baitfish that the Fluke is chasing. Of course, a Carolina rig also employs a swivel to keep the weight away from the trailing soft plastic and to prevent line twist.