<p>A muntin strip miter cutting apparatus for cutting muntin strips into muntin sections and assembly of muntin sections into muntin lattices. The apparatus has at least one muntin cutting blade which cuts muntin strips to produce mitered muntin sections. A piercing system pierces the muntin sections to provide apertures to assist with final assembly. The muntin sections are assembled with keepers at an assembly station to produce muntin lattices which are inserted between two or more panes of glass.</p>
