What happens to a fastener when the set torque is reached on a click torque wrench?

When the set torque is reached on a click torque wrench, the mechanism inside the wrench engages to signal that the desired torque level has been achieved, resulting in an audible click. This is a designed feature that helps the user know that the correct amount of torque has been applied to the fastener. The clicking sound is produced as the torque wrench slips past the preset tension, allowing the handle to either move slightly or disengage from the ratchet mechanism, preventing any further tightening. This function enhances accuracy and prevents over-tightening, which can damage the fastener or joint being worked on.

The other options don't accurately describe the operation of a click torque wrench. The handle breaking would not occur as part of the normal function, and the socket spinning freely or the tool disengaging without a click does not convey the necessary feedback to the user about the torque applied.