Torque wrench which can be used as a ratchet

A screw driving tool comprising:

• a switchover element, a blocking element, a ram, a torque transmission element, a torque transmission section, a torque output element, a spring, an adjustment device, and a housing;
• wherein the switchover element is movable from a release position into a blocking position:
• wherein the ram acting on the torque transmission element is movably located in the housing and is biased by the spring;
• wherein a pretension of the spring is adjustable by the adjustment device in order to adjust a torque limit;
• wherein the switchover element cooperates with the blocking element, the blocking element being movable from a first position to a second position;
• in the release position, the blocking element being in the first position and allowing movement of the ram, wherein the tool has a function of a torque wrench, transferring only torques which lie below the torque limit from the torque transmission element to the torque transmission section coupled to the torque output element;
• in the blocking position, the blocking element being in the second position and inhibiting movement of the ram, wherein the tool has a function of a standard screw driving tool, with which torques can also be transferred from the torque transmission element to the torque transmission section which lie above the torque limit;
• wherein the torque limit can be adjusted by the adjustment device.