Description This item is a professional dual way adjustable truss rod for guitar, 4 string and 5 string bass. Rod body is wrapped in blue shrink wrap, and an extra steel bar is also included. 460mm quality guitar truss rod dual action type, welding point in place. High-quality adjustment lever ensures that each guitar has a perfect and stable quality. It acts in both directions can increase curvature both ways. Features - Material: Steel - Color: Blue - Total rod length: Approx. 460mm/18inchs - Rod head inner diameter: Approx. 5mm - Outer diameter:Approx. 9.5mm - Professional dual way dual action adjustable truss rodsuitable for bass and guitar, easy to install and use. - Full length 460mm/ 18 inch quality guitar truss rod dual action type, welding point in place. - Acts in both directions can increase curvature both ways. - Dual action adjustable rod with pull type compression for adjustment. - Strong steel construction to ensur maximum endurance for durable and long-lasting use. - Rod body is wrapped in blue shrink wrap, and an extra steel bar is also provided.Packing list: 1 x Guitar Truss Rod 1 x Steel bar