If you have a Roland product (mine is a TD-20 electronic drum module) which has the appropriate type of mounting bracket as specified in the description, this clamp will allow you to mount your equipment to a cymbal stand, or other type of stand and expand the utility of your equipment. Previous to buying this clamp, when I would use my module with another set of drums I have which use triggers, I would keep my module in the road case which I use to transport it. The module mount on the Roland TD-20's is really not adapable to another kind of stand. The road case worked *okay*, and kept the module protected, even sitting on the floor, but it was not nearly as convenient as having the module properly mounted and at an easily reachable location on the kit.
The other nice thing about this clamp is that they include a *metal mounting plate* for your equipment. Since my TD -20 module came with a plastic mounting plate, I was happy to change it out for the metal mount which came with the clamp. I've never had any issues with the plastic mounting plate, but the metal one included with the clamp seems to be a heavier duty plate and a better choice. (The stock Roland mounting plate also fits in the clamp, so you can have a spare if one breaks for some reason)
If you've been looking for a way to professionally mount your module to a stand, this does the job nicely.
The only caution I would issue is that you MUST make sure the stand you use the clamp on is heavy enough, (with a low enough center of gravity), to comfortably support the additional weight of the module being attached to the stand where you want it. Make sure that the added weight doesn't make the stand prone to tipping over. (I'm using a heavy duty Yamaha cymbal stand with a wide base)
If the stand can not support the weight of the module, or other equipment, without being prone to falling over, you could easily do several hundred dollars worth of damage to your equipment, if you do not take the precaution to mount it properly. That would, by definition, include using a stand which is suitable for such an application.