This kind of truss rod is made of iron material, which is durable and not easy to deform, you can use it for a long timeThis truss rod could be used to repair electric guitar, making your playing more convenient and easierThere are 2 truss rods in the package, enough to meet your different kinds of needs, you can order according to your needThe smooth surface will not harm your skin, you can use it without worriesDesigned with small size, this truss rod is portable, will not occupy so much spaceSize: 42cm, outer diameter: 9mmMaterial:steelcolour:BluePackage Contents:2 X Guitar truss rod1 X wrenchOnly the above package content, other products are not included.Note: Light 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.