Description from Woodbrass :
Drumtacs are releasable, reusable, super tacky sound control pads. Used as directed, they will not flap, buzz, fly off or harm any percussive surface including: bottom heads, vertical heads, underneath cymbals, inside bells and blocks ? even under heavy pounding and in extreme temperatures. Not just a dampener! Drumtacs are selective. A single tac placed about an inch from the rim will remove only the high frequency overtone and leave a deeper focused sound with improved response and increased attack. As the Tac is moved toward the center of the drum more frequencies are removed and dampening occurs. Problem Drums with a nasty buzz or ring can often be tamed with drum tacs? try two!!! One on the batter head and one on the resonant (bottom) head. A single tac placed on the underside of a cymbal near the dome, will slightly darken and mellow the tone. Placed on the edge, the Tac will heavily dampen the sound. In between those two placements are endless sound control options. Instructions: Remove and discard paper backing and do not reuse it. Always use a clean, dry Tac on a clean, dry surface. Press the Tac firmly onto the surface with fingers. CLean Tacs and surfaces with Rubbing Alcohol. Allow Tacs to dry completely sticky side up. Drumtacs may be cut with scissors for smaller footprint and effect.