Ultimate Support QR-5 - Five QuickRelease Adapters for Mic Stands and Microphone Clips & Carrying Case Bundle Ball bearing, teeth/groove fitting with extra tight, quiet connection Incredibly easy to disconnect the top half from the bottom half Made from super strong machined steel 5/8 thread on both endsFive (5) QR-1 adapters included Free carrying case included Ultimate Support QUICK RELEASE MIC STAND CLIP AD