The guitar sound beam plays an important role in the sound of the guitar. If part of the volume is separated or , 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 . Once problems with the sound beams are discovered, this supporting jack comes in handy. It saves time and effort for you to re-fix loose, cracked sound beams or even small wooden blocks. The method to deal with the loose volume is very simple. First, use glue between the sound beam and the wooden board, then put the 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 the jack to fit the volume and fix the Material:Metal + Plastic colour:White Package Contents: 1 * Guitar sound beam jack 3 * extension rods Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.