Made with Titanium and Nickel the Clam Nitinol Spring bobbers are not only highly sensitive, but also kink free and extremely durable. This same material is used in the Dental Industry. Strong, durable yet pliable. High Visibility orange wrap and glow bead for easy bight detection. Grab your favorite panfish rod, add Clam's Nitinol spring bobber and you won't miss those finicky biting fish!