· DrumDial quickly and precisely tunes all drums by accurately measuring drumhead tension NOT tension rod torque. Tension rod torque can be used to tell you when you are over tightening a bolt to prevent thread damage · but is not accurate for drum tuning because of the difference in screw tolerances · plating · corrosion · and thread wear. You can eliminate these problems by using a DrumDial to measure drumhead tension directly from the drumhead · allowing you to precisely tune your drums faster and easier than ever before.