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Some cordless screwdrivers, cordless drill/drivers, impact drills and rotary hammers have a two-speed gearbox. A gear shift can be used to select between first and second gear. Like in a car, the first gear is characterised by low speed and high torque (= slow with high power). This setting is suitable for driving screws with large diameters. The second gear combines high speed with low torque (= fast with low power). It is recommended for fast driving of small screws.