For the serious screwing jobs, the Stanley Fatmax FMC647D2T-QW is the tool you are looking for. The 18 volt impact screwdriver has a maximum torque of up to 180 Nm, which is powerful enough to loosen seized screws, nuts or bolts. Thanks to the light weight and compact size, you also do this in hard-to-reach corners. And if you are in a tight space to do, then you only need one hand to change a bit. That way you can work through quickly. In the supplied TSTAK case you neatly store the impact screwdriver with batteries and battery charger.