Booyah One Knocker Lipless Crankbait 1/2oz 2 1/2 in Crushed Bone. One Knocker lipless crank bait sets itself apart from the crowd with a unique fish-catching sound and cutting edge color patterns. The One Knocker is famous for its single oversized tungsten rattle that produces a ''thump'' unlike any other rattle bait. Package Contents: Booyah One Knocker Lipless Crankbait Booyah BYHKK1221: One Knocker Lipless Crankbait 1/2oz 2 1/2 in Crushed Bone