A simple device but well made and very useful.
I wanted to save mic stands around a drum kit so used a couple of these to get mics under the snare (on the same stand as the top snare mic) and for a mark tree (on the same stand as the hi-hat mic).
The clamp worked perfectly holding on to the upright, and had more than enough capacity to be attached to much larger shafts. Not limited to other mic stands!
It would also work well holding a mic - maybe even on a short boom - for an acoustic guitar, for example, on the same stand as the vocal mic.
As supplied it comes with bright green trim on the knobs. If these are not to your taste, plain black rings are supplied as alternatives - a neat touch.
I can see this getting a lot of use, and would thoroughly recommend it. Good value for money.