Using this Wera torque wrench is easy. First, decide on the torque value you need within the 2.5 - 25 Nm range. Then, set this value on the wrench. You'll get audible and tactile feedback when you reach the scale values, which helps you set the torque safely. When using it, make sure you're using it with your right hand as it's designed for right - hand use. As for maintenance, keep it clean and dry. Avoid dropping it or using it with excessive force as this can affect its accuracy. If you notice any issues with the click or the release mechanism, it's best to get it checked by a professional.