this is not the best video. A little grainy and the sound waivers but I think you will get the idea that these lugs will allow you to change the tune of your drums by turning one lug and keeping the entire drum head in tune. Each tap at the lugs will produce the same tone. I missed a few taps and hit closer to the rim but you can hear the tones. The sound is from a small camera, but if you listen closely you can hear the high pitched sound after the sticks hit the drum. I wish I had better equipment for Gary's sake. Anyway here is the video link.