Shure A53M Isolation and Swivel Shock Stopper Microphone MountThe A53M from Shure is a high quality isolation mount and swivel adapter. The mount has standard threads for use with a variety of mic stands and boom arms. The full circle design provides a secure hold, reducing mechanical noise and vibration by up to 20dB. The mount is compatible with virtually any tapered microphone, including the SM81, SM94, VP64, KSM137, KSM141, and 849.