mixed key

As seen, the combined key is a combination of two types of keys. And that's the advantage of this key: practicality. It is very common, in a service, to first need to loosen a screw and then actually remove it. In this sense, the combination wrench is perfect: the star wrench is ideal for a stronger loosening movement; the spanner, in turn, makes the movement of unscrewing very well. In addition, another good advantage is that this tool is sold with different size standards, always having the same on both ends (either in millimeters or inches). Thus, you are sure you are working with the right key for your use.