Answer: Water will build up in an air compressor during use.
A "dryer", or an in-line water separation filter should be used to prevent moisture from reaching the tool components.
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Do Mirka sanders come with a pad wrench?
Answer: A wrench is supplied for changing the backing pad on a Mirka DEROS, Mirka PROS or Mirka ROS. You can find it located in the original packaging of the sander.
