Description: The guitar sound beam plays an important role in the sound of the guitar. If part of the volume is separated or damaged, its vibration cannot be effectively transmitted to each original position when the guitar is played. The richness and balance of the sound will be affected and damaged. Once problems with the sound beam are discovered, this supporting jack comes in handy. It saves time and effort for you to loose, cracked sound beam or even small wooden blocks. The method to deal with the loose volume is very simple, use glue between the sound beam and the wooden board, then put jack in, adjust the appropriate height, wipe out the excess glue that is squeezed out, and wait for the air to dry. It has an elastic screw nut, which can easily adjust the height. The height adjustment range is from 65mm to 128mm. There are grooves on the top and bottom of jack to fit the volume. An essential tool for repairing musical instruments. Package Includes: 1 Guitar sound beam jack Note: Please allow slightly errors due to manual measurement and different monitors.