The Fox Edges Tadpole Inline Insert (10 pcs) is specially designed for creating a semi-fixed inline shock system that provides an optimal bolt effect. Thanks to the flexible edge, the lead is held firmly in place for an immediate hook set, after which the lead can slide completely freely over the main line after hooking. This unique mechanism prevents the fish from using the weight of the lead to dislodge the hook while shaking its head. With these reliable inserts, you can quickly create an extremely effective and fish-safe rig that minimizes the chance of lost fish and puts more fish on the mat.