Rotary mode change switch for a hand tool

A rotary mode selection switch for the synchronized switch over of an operating mode of a hand tool comprising a manually externally operated driving member (2) and a driven member (3), wherein the driving member (2) and the driven member (3) are axially fixed mounted and freely rotatable relative to one another, wherein the driving member (2) includes two eccentric recesses (5, 5′) arranged perpendicular to the axis of rotation (A) for receiving two spring elements (6, 6′) and the spring elements (6, 6′) include initial front surfaces (7, 7′) that contact the driving member (2) and second surfaces (8, 8′) that are oriented in a same direction, such that with an angle shift (α) of the driving member (2) relative to the driven member (3), at least one of the second surfaces (8, 8′) of the spring elements (6, 6′) alternately contacts at least one eccentrically disposed contact piece (10, 10′) engaged axially into the recesses (5, 5′).