Torque wrenches is a device used to screw down implant screws to the correct tightness value (pre-determined by the implant manufacturer).

• Move the torque wrench until you hear a "click sound" When the torque wrench bends, that is how you hear the click. The click sound indicates you've reached the complete torque. 
•  If the torque wrench is already bent, you already achieve the torque.
• There is no click after that.
• If you go move the torque wrench after the click sound, you may break the screw.