I see.
I had this one on my basdrum:
[IMG]http://thumbs3.ebaystatic.com/m/m6B3x7HgDD2bXcLMVBGFBOA/140.jpg[/IMG]
But I even get beside the other one, as on that first one. I did not know what it was for....
Actually, I do not use any of them now,I have tom on a snarestand , but it´s nice to know what it is for.