I like this key because it is heavy and exceptional. It takes a little moment to find the proper position to fit the key into the truss rod of the guitar but it works. You do not have to be afraid of breaking of something. It is solid and better than classical hex key in most of the guitars. The key was packed together with my Maton guitar so better ask the seller if it is so because some people here wrote that it is neccessery to include into your order.