Abstract: A method and tool for trimming a part formed in a plastic web comprises positioning the part formed in the plastic web between a tool comprising a first punch and die plate assembly and a second punch and die plate assembly. The first punch and die plate assembly comprises a base punch and a lid die plate. The base punch has an outer edge corresponding to an edge of a bottom surface of a base of the part. The lid die plate has an inner edge corresponding to an edge of a bottom surface of a lid of the part. The second punch and die plate assembly comprises a base die plate and a lid punch. The base die plate has an inner edge corresponding to an edge of a top surface of the base of the part. The lid punch has an outer edge corresponding to an edge of a top surface of the lid of the part. The method further comprises actuating the tool so that the first punch and die plate assembly and the second punch and die plate assembly sandwich the plastic web cutting at least a portion of the part from the plastic web.