jigsaw is a versatile tool that easily cuts metal when you use the proper blade. You need to use a fine-tooth blade that has 21 to 24 teeth-per-inch (TPI). The higher the TPI, the finer the cut you will receive from the jigsaw. Beyond the blade, you will need to support the metal while cutting. Unsupported metal will bounce while you cut. This reduces the accuracy in cutting by the jigsaw and can cause the saw blade to jump from the cut and cause you or people in the area serious injury.
Insert a blade into the jigsaw. Pull on the end of the blade to ensure that it is secure.
Slightly depress the trigger of the jigsaw to start the blade moving slowly.
Drill a 5/16 inch hole at each corner of an interior metal cut, if the cut does not intersect the edge of the sheet metal.
Repeat steps eight and nine at each corner hole.Keep your feet clear of the sheet metal as it falls from the hole.