MINF is a valuable tool when the task at hand is quick and safe removal of paint runs or sags. The ergonomically designed handle is easy to grasp and uses a strong magnet to hold a two-sided file in place. One side is coarse-cut, and the other is fine-cut. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.