Why are swim baits the only lures to adorn the business end of castable umbrella rigs? Because the stiff wires impede the action of crank baits and other lures. The Boo Teaser Rig changes that with a center lure arm made of super-strong, flexible, nylon encased wire that allows crank baits and other lures to swim naturally. The Boo Teaser Rig features four stainless steel outer arms with teaser grubs (included) to add the baitfish school look and vibration of a castable umbrella rig, but the center lure arm is flexible, allowing anglers to use any lure - not just a swim bait - from a crank bait to a jig. Now anglers can throw a shallow-running crank bait on their castable umbrella rig and work it on bottom in any depth. Plus, the Boo Teaser Rig is legal anywhere you fish.