Using your DeWalt DWMT17061 Digital Torque Wrench is a breeze. First, insert the provided batteries into the wrench. When you start working, choose the appropriate measurement unit - ft./lb., in/lb., or Nm - using the button on the wrench. Then, set the desired torque value. You can easily read the value on the backlit LED screen. To perform a task, attach the wrench to the fastener and turn it until you reach the set torque. When using the wrench, make sure not to exceed the 20 - 100 lbs torque range to avoid damaging the tool. Also, keep it away from water and extreme heat. For maintenance, wipe the wrench clean after each use with a dry cloth. If the rubber bumper gets dirty, you can wash it gently with mild soap and water. Periodically check the batteries and replace them when they are low. Store the wrench in the provided case to protect it from damage.