1The string bridge is mainly used to set up strings, which can affect the feel of pressing the strings and the volume of the piano box. 2The string bridge is made of zinc alloy, which is resistant to corrosion and friction, and is not easy to slip when the strings are set up. 3The string bridge is suitable for 4string electric headless bass, so that the pitch is good when playing. 4The height of the string bridge is just right, the left hand is easy to press the strings, and there will be no noise during playing. 5The kit is very complete, equipped with screws and wrenches and other parts, easy to install. Item Type: Bass String Bridge Material: Zinc Alloy Suitable For: 4-string electric bass Bass String Bridge Size: Approx. 95 x 90 x 26mm / 3.7 x 3.5 x 1in Wrench Diameter: Approx. 1.5mm / 0.1in 2.0mm / 0.1in 3.0mm / 0.1in 4mm / 0.2in 1 x String Locking Nut 1 x Headless Bass Bridge 7 x Mount Screws 1 x 1.5mm Wrench 1 x 2.0mm Wrench 1 x 3.0mm Wrench 1 x 4.0mm Wrench