Rat-L-Trap Vibra-Trap -- The Vibra-Trap looks a lot like any other Rat-L-Trap, but it has Tru-Tungsten shot in its PowerBall Chamber, which generates a hard-knocking, low-frequency sound and vibration. The subtly different Pot Belly design and the Vibra-Ribs on the bait's back half provide realistic swimming action and sound. (www.rat-l-trap.com)