FeaturesMaterial: The metal body ensures high strength and durability for practical use.Enhanced Stability: Designed to secure guitars strings in place, improving tuning stability and overall performance.Easy Installation: Simple to install, allowing quick adjustments without the need for special tool.Functional: Relieve the guitars strings and reduce the wear of the strings to extend the life of the strings.Package: Set of 6 blocks for replacing old or damageds Tremolo bridges insert blocks.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementSize: 8.15*5*4mmMaterial: Metal Package List:6pcs String Lock Insert Blocks