Features: 1.This product is made of zinc alloy, which is not easy to rust and oxidize and increase the service life. 2.Three different colors are available for you to choose from, which can correspond to different color guitars, making the guitar look more beautiful. 3.The product has headstock string retainer bar, can fix the strings more better . 4.The complimentary wrench and mounting screws make the locking nut easier to install, you can easily get it. 5.The product has lightweight size makes it convenient to carry out for playing anywhere or anytime. specification:Item Type: Electric Guitar String Lock Nut Material: Zinc Alloy, Copper Optional Style: Gold(GE98), Silver(GE100), Black(GE99) Use: Suitable for guitar maple bridge String Holder Length: Approx. 42mm / 1.7in Lock Nut Size (length x Width): Approx. 42 x 15.6mm / 1.7 x 0.6in PackageList:1 xHeadstockStringRetainerBar2 x Screw1 x Lock Nut2 x Screw1 x Hex Wrench