Patent ID: 8408097

Claim:
A screwing tool, comprising: a housing: a drive arranged in the housing; an output shaft connected to the drive and having an axis of rotation, a screwdriver bit being mounted on one end of the output shaft; a mounting part surrounding the output shaft and guided such that the mounting part is axially movable along the axis of the output shaft; a restoring element, wherein the mounting part is axially movable against a force of the restoring element; a ring-shaped screwing tool surrounding the output shaft and the screwdriver bit, the ring-shaped screwing tool being rotatably mounted on the mounting part and configured to grip drive contours on a lateral surface of a connecting element to be screwed-in by the ring-shaped screwing tool; at least one shiftable clutch arranged between the ring-shaped screwing tool and the output shaft, wherein the at least one shiftable clutch is a nonpositive and self-shifting friction clutch with first and second clutch elements; and an additional externally shifted positive clutch arranged between the ring-shaped screwing tool and the output shaft.