# You will need to find a piece of scrap sheet metal larger than the punch you want to use. The material will also need to be large enough to hold onto.
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# Drill a hole roughly 1/16" in the location of where you want the center of the punch to be.
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# Make sure the handle of the punch is up and rotate the top carousel to the desired punch.
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# Lift the locking handle and rotate the bottom carousel to the matching letter.