This is an excellent tool for the removal and installation of fixed sights for your Beretta PX4. The only prep work I did before installing the new sights was, as becker recommended, sand the base of the replacement Beretta adjustable sights. I would have given the tool a five-star rating, but I found that the included literature did not address the Beretta PX4 adequately. Contrary to JC's review, this tool DOES work with the PX4, however, one must completely disassemble the adjustable sights (that is, remove all of the adjusting screws from the sight) so that the slide can escape the tool once installation is completed. Now I can finally shoot straight.