Design: This electric guitar component features a unique tremolo pressure string system with embedded black iron blocks, enhancing your guitar's performance and stabilityMaterial: Tremolo Bridge String Saddle Insert String Lock Blocks Crafted from metal, this product ensures long-lasting durability and reliable performance for all your musical needsCompact Dimensions: String saddle insert string lock blocks with dimensions of 8x4x5mm, these components are designed to fit seamlessly into your guitar setup without adding unnecessary bulkEnhanced Performance: Specifically designed to improve the functionality of double locking tremolo systems, these small iron blocks offer control and improved sound quality during performancesApplication:Tremolo bridge saddle insert block is suitable for most tremolo bridge saddle.Easy to install and convenient to use, ensures you a long time use Specification: Material: metal Size Chart: 0.8x0.4x0.5cm/0.31inchx0.16inchx0.20inch Package Includes: 6x insert string lock blocks Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.