No need to continuously hold the whammy bar for electric guitar down when adjusting or removing strings. Simply push the bar down once and slide changer guitar shim under . Use this innovative electric guitar parts shim to greatly reduce your string-adjusting time.Replacing broken strings on a floating guitar bridge tremolo doesn't need to be meticulous. Keep your guitar in pristine condition. When replacing tremolo parts, can happen creating dents and gouges in your guitar. ABS bottom covers the entire underside of this shim, preventing scratching and holding it in place, making it easier to make adjustments.The tapered sides run the entire length of the shim, making it simple to insert under . Material: ABS plastic colour: black Package Contents: 2 x Protective padding Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.