Description: High quality 4-string headless bass guitar locking nut. Tightly hold the strings. Made of zinc alloy material, which is anti-corrosive and durable. Portable, easy to install. Supplied with 2 wrenches and 2 mounting screws. Size Chart: Length: Approx. 39.2mm/1.54inch Width: Approx. 26mm/1.02inch Package Includes: 1 Piece Locking Nut 2 Pieces Hex Wrenches 2 Pieces Mounting Screws Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size