Designed this due to problems with my Aukey microphone holder. The stock plastic thing which supports the microphone arm inside the mount is too little around the outside and too big around the inside. This resulted in the microphone arm scratching the mount and not being stable at all.

I don't know if this fits into other microphone mounts, but as far as I have seen, other cheap microphone holders incluced with the microphones look the pretty much the same.