On Stage SS7745LOK Subwoofer Pole with Locking AdapterSet your speakers straight! All speaker speaker stand connections have some degree of wobble. A patent pending speaker adapter provides an effective, automatic response to crooked and tilted speaker setups. A manually activated ring controls sliders that expand to fill the gap between the pole and the insert, reducing the degree of wobble from wind, sound, or audience vibrations. The oversized activation ring makes locking unlocking quick and easy.