1. TimeSaving Guitar String AdjustmentThis innovative shim significantly reduces the time required for string adjustment, making it easier and more efficient to broken strings on a floating bridge tremolo. No longer do you need to meticulously hold the bar while adjusting or removing strings. Simply press the bar down once and slide the stringchanging shim under the bridge. 2. Protects Your GuitarWhen replacing tremolo parts, slips can occur, causing dents and scratches on your guitar. The ABS underside of this shim covers the entire bottom, preventing scratches and keeping it securely in place. It helps maintain your guitar in flawless condition. 3. Easy to UseThe tapered sides of the shim run along its entire length, allowing it to be easily slid under the bridge. It fits both 6string and 7string floating tremolo bridges. Depending on your guitar, you can choose between the 5mm sides. 4. Includes Adjustable Wrench AccessoriesThe product comes with a set of wrenches, providing additional convenience for adjustments. This professional tool is also for guitar enthusiasts.