Yo-Zuri RattlN Vibe One Knock is next generation has a single knocking rattle with the same great action of the Rattln vibe series. The belly and face weights give the One Knock perfect balance allowing it to be fished in a variety of ways. Burn it and it tracks straight with a tight wiggling action. Yo-yo technique has a seductive wiggle action on the fall and it easily rips out of the grass. It's effective all year but particularly deadly in the fall through mid-spring. Has great color pattern to catch fish too.