The present invention relates to a clipping tool assembly for closing a closure clip in a clipping machine for forming sausages. The clipping tool assembly comprises a first and a second closing tool movable between a closed and an opened position; a drive means for moving the closing tools in a closing direction, the drive means including a crank shaft having a first and a second crank pin. The clipping tool assembly further comprises a first and a second tool arm having first and second ends, with the first and second closing tools being attached to the respective first end, the tool arms being coupled to the crank pins in the region of their second ends. A first and a second linear guide slot is provided in the region of the second end of the tool arms, in which the crank pins are slidable guided.