This item belonged to my father, who enjoyed making guitars in his lifetime. It was purchased from StewMac. It appears to have been mounted once and then removed and stored. While there are scratches and dirt overall, there seem to be no critical defects that would prevent its use. However, I am not an expert on truss rods, so I cannot provide further evaluation or explanation. Total length is approximately 440mm, width is approximately 12mm, and the wrench specification is approximately 5.7mm. It appears to be for a 14-fret joint, long-scale neck. Please also refer to the StewMac website below: https://www.stewmac.com/luthier-tools-and-supplies/materials/truss-rods/adjustable-truss-rods/u-channel-truss-rod/?queryid=72ddee62cc8d530be84c922548fd84de Please understand that this is a used item before considering a purchase.