The Jackall TN 60 Disc Knocker incorporates a disc-shaped weight in its sound chamber, creating a unique, deep sound, perfect for tempting even pressured fish to bite without hesitation. Plus, the bottom lip of the Disc Knocker has the same tungsten weight as the original TN 60/70, which not only allows the bait to swim level at the slowest retrieves but also to stand straight up on the bottom when stopped.