Specification: Product: Electric Guitar Locking Nut Clamp Iron block size: 11.8 x 11.6mm Material: Iron and zinc alloy Color: Black Package includes: 1 x Electric Guitar Locking Nut Clamp + 1 x Hexagon Screw Strong, rust-proof, wear-resistant, durable, with high strength and long service life. Lightweight, easy to carry, easy to install and use. Good replacement parts for electric guitars. Compatible with electric guitar replacement parts. Suitable for some double rocker electric guitars and Korean electric guitars.