Drumtac Demo The Skinny on the Black Dots Comments Hey guys! I've had some questions about what these black dots are on my drum heads. Here is a quick demonstration of what these little guys are, what they do and how to take care of them. Without further ado, I give you... "Drumtacs." You can pick up Drumtacs on Amazon and Sweetwater or just go straight to the source at Drumtacs.com.