Ferrules bushings with nuts help electric guitar/ bass body and neck connected. Made of reliable quality material, they are suitable for electric guitar and bass players, luthiers, DIY lovers and more. Features: Designed for helping electric guitar/ bass body and neck connected. Recessed neck screw bushings, for electric guitar or bass neck place, easy to install, convenient to use. Sturdy metal material, with high strength and durability. Rustproof, anti-corrosion, wear resistant and shiny. Perfect accessories for electric guitar and bass players, luthiers, DIY lovers, etc. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Silver/ Black/ Gold (Optional) Material: Metal Screw Size: Approx. 44.5 * 4.5mm / 1.75 * 0.18in Ferrule Diameter: Approx. 14mm / 0.55in Package Size: Approx. 7 * 5 * 1cm / 2.76 * 1.97 * 0.39in Package Weight: Approx. 40g / 1.41oz Package List: 4 * Screw 4 * Ferrule