Gravity GR-GSAGRIPLOCK Grip Lock Adapter Sleeve for Speaker StandsForget wobbly speaker pole connections and twisting PA speakers! With the Gravity Grip Lock, your PA speakers stay firmly and securely in place. The SA GRIP LOCK is a steel locking adapter for 35mm tripod poles. With its ergonomic design, the Grip Lock is quick and easy to set up and also provides a low resonance connection to your speaker. How does it work? The expanding flap system with its robust components is easily adjusted by turning the top