What's in the box:

Electric Guitar Tremolo Bridge String Locks Strings Locking System Metal Nut Block & Clamp Hex Screws Guitar Parts Accessories, Pack of 3 Sets (Silver And Black)

Features:
Strings locking system for electric guitar tremolo bridge.
Metal material, durable and anti-corrosion.
Pack of 3pcs nut blocks and 3pcs hex screws.
Easy to install, great guitar parts replacement.

Specifications:
Color: Black/Silver/Gold/Silver+Black/Gold+Black(optional)
Material: Metal

Package List:
3 * Nut Blocks
3 * Screws