The superiority of cordless power wrench is self-evident: Firstly, cordless design gives users greater mobility than wired units, making every nook and cranny an accessible working area, whether it's inside a motor or free-standing in some remote wilderness. Second, because the wrench has a high-torque capacity, people can solve otherwise difficult sealing jobs with one quick spin instead of losing hours trying and failing--thus both time and energy are saved. Third, battery life is long and this means less disturbance for work when use carries over from one day to another, thus making it easier to carry on with the job at hand. What's more, not only is you escape the vibration and noise of ordinary wrenches when using this tool, but also have a much more comfortable working environment that is safer for all concerned. Finally, this tool is light, compact and handy to use. Hence its ergonomic characteristics are not only good for the user but make it extremely amenable in employment.