A Tuner Fish lug lock is a fish shaped attachment with a star shaped cavity in the body that fits over the top of the tuning rod, so that the “tail” rests against the hoop, effectively locking it in place. Using a Tuner Fish Secure Band you can attach them to the rod ensuring that they stay on even on the resonant side.  Made from durable polycarbonate, they are extremely durable and very strong and you can expect your drums to stay in tune even after many performances and hours of intense recording.