This is an adapter to mount the Andonstar ADSM302 microscope to a microphone stand/arm

The hex opening is for a m10 nut. Most microphone arms will fit, I just replaced the imperial bolt to a metric m10 bolt on mine.

Some disassembling and soldering required.

I also added an alternative adapter, which I used on an old magnifying glass arm and it needed some changes to the original adapter

For this microscope:
https://goo.gl/Fw2ZyN