DrumDial Drum Tuner 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. Highlights Digital LCD display measures true Timpanic pressure from 0-100 Custom foam lined protective hard shell case Glass calibration standard Edge Gage Lug back drum key holder Tuning chart and Instructions Simple one touch calibration that maintains the cal point even when powered down! Specifications Type: Drum Tuner Compatibility: Acoustic Drums Display: Dial Gauge Power Source: Passive Manufacturer Part Number: DD Please feel free to reach out to our knowledgeable sales staff with any additional questions!