The Off Shore Tackle Tadpole Diving Weight is the simplest, most compact inline diver for getting your lure down to the strike zone. Originally developed for walleye trolling, the Tadpole has proven its worth on many species and water types. A pair of coastlock snaps are the only moving parts: one attaches to your mainline; the other connects to your leader and trips on the strike, sliding from the dive position to the fish-on position.