Gibraltar SC-QRHHDC Quick Release Hi Hat Drop Clutch Quick release mechanism replaces the standard screw-on threaded nut with a spring-loaded lock that slips on and off in less than one second Just pull down on the collar and it slides off, to reinsert just depress the middle section with your thumb saving you time and making it easy to mount and un-mount hi hat cymbals Does away with threads, meaning no more loosening of the bottom nut - making this the fastest and most convenient clutch available today Outperforms the standard clutch in versatility, ease of use and setup time