Clam Nitinol Spring Bobber. Made with titanium and nickel, 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 and sturdy, yet pliable. Hi-Vis orange wrap and glow bead provide easy bite detection. Grab your favorite panfish rod, add Clams’ Nitinol Spring Bobber, and you won’t miss those finicky biting fish.