The Jackall Knockin' Jaw is characterized by it's protruding lower jaw that allows the bait to move along the bottom laterally with its jaw knocking against anything it comes in contact with to create an enticing vibration. With three places to tie your line you can work the bait on a fast retrieve, a slow retrieve, or a lift and fall retrieve.  The lower jaw also makes this a great vibrating bait for when the fish get spooked from the traditional sound of a lot of rattles.