Back to Shop Truss Rod WrenchMSRP -$5.00 USD 4mm truss rod allen wrench. Sizes Choose an option4mm Clear Quantity Add to cart You May Like Córdoba Guitar Picks (12) $3.99 USD Córdoba Ukulele Polyfoam Case $30.00 USD – $85.00 USD Córdoba Folding Wood Footstool $29.99 USD Córdoba Nylon String Guitar Capo $12.99 USD