This was purchased to be able to attach a K&M 23560 85cm stereo bar (3/8" hole thread) to a K&M 20811 extra high microphone stand (1/2" bar thread).
I hadn't come across the 1/2" thread before so was glad that a simple adapter exists. It might also be encountered on some older mic clips but then a reversed adapter would be needed.
All works as it should and the item seems solid and well manufactured.