I recently bought some new Fender saddles for my Strat, so I needed this for the setup. It certainly did the job, and although Fender designed an unnecessarily small gauge, (0.05") it has done quite a few adjustments since purchase without any noticeable wear. Therefore, I would judge it to be a well-machined tool, made from good material. The downside is the price, I think it's shockingly expensive for a hex key!