DescriptionAre you looking for a professional, yet affordable electric guitar string locking nut block set? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! This set of locking nut clamp with screw must meet you needs. It is one of the best choices for you.Features- Material: Iron and zinc alloy. - Size: about 1.10X1.10X0.30cm/0.43X0.43X0.12in. - Made of iron and zinc alloy, durable for lasting use. - Replace old or broken tremolo bridge string locks with a new one. - Tightly locking the strings, it is not easy to loose. - Suitable for some double rocker electric guitar, and Korean Style electric guitar. - Comes with 6pcs hexagonal screws, easy to install.