The Power Lock Plus® Spring Keeper Hook features a tapered spring gripper, offering a secure hold for your favorite swimbait with as much as 80% more grip strength. The unique adjustable sliding, build-in weight allows for back, forward or centered presentation. Moving the weight is easy. Rotate the weight several times to heat silicon insert. Move the weight to desired position. As the insert cools, the weight will be held firmly in place again. Back position will push the bait backwards under structures like logs and docks. Use with tube baits, crawfish or jerkbaits. Forward position will make the bait dive nose down. Use with worms, Gidzit or tubebaits. Centered position will make the bait sink horizontally. Use with tube and jerkbaits, lizards and worms. The wide gap provides excellent hooking and holding abilities for big fish. Use it for Bass, Perch, Zander, Pike, and Walleye.