MX Black Universal Microphone Clip Holder 2-pack with 5/8″ Male to 3/8″ Female Nut Adapters. Break resistant microphone clip that securely mounts the SM58, SM57, SM87A, Beta 87A, Beta 87C and all other microphones with 3/4-inch and larger handles to a standard microphone stand. For nearly 40 years, MX has been one of the nation?s leading suppliers of microphones and pro audio equipment. MX Believes in quality, innovation and customer service and is committed to the needs of music professionals throughout the world.