Feature: 1. Excellent Zinc Alloy Material: This guitar intonation adjuster is made of excellent zinc alloy material, which is sturdy and durable, not easy to be damaged, and has a long service life. 2. Accurate Adjustment: This guitar intonation adjuster is a vibrato system intonation tool for setting the intonation on the bridge, which provides accurate intonation adjustment. 3. Efficient: This guitar intonation adjuster is efficient, you can set the intonation faster and more accurately than setting it manually. 4. Easy To Operate: This guitar intonation adjuster is easy to operate, all you need to do is slide the key into the proper position on the string locking screws, loosen the saddle mounting screws, and enjoy fingertip control of the saddle position for accurate intonation. 5. Compact And Portable: This guitar pitch adjuster is small in size and light in weight, which makes it very convenient to carry around and use. Specification: Item Type: Guitar Intonation AdjusterMaterial: Zinc Alloy. Package List: 1 x Guitar Intonation Adjuster Note: Do not attempt to adjust the string to tension, you will need to loosen, adjust, and retune. Work on only 1 string at a time and loosen only 1 bridge at a time.