This Expert by Facom 3/4" Female / 1/2" Male coupler accessory means that you can adjust your tools to suit the needs of every job, quickly & simply. Using this accessory means you no longer have to hunt around for additional tools to suit a certain bolt or nut, you can simply adapt your existing tool, therefore saving time & effort. It is made from Chrome vanadium steel for strength & durability, so is certainly up to the job. In a stylish matt chrome finish. This socket is for manual use only.