Truss rods allow the curvature of the neck to be adjusted due to the natural “bows” or “warps” caused by string tension. The Grover® truss rod wrench is made to fit the two most widely used truss rod sizes; 1/4 “ and 5/16”. An indispensable tool for all players. Available in: No. GP140 –1/4” size No. GP150 – 5/16” size
