The No. 5 Jr. punch has a standard 1 3/4-inch throat depth, while the No. XX has a deep throat configuration to punch up to 3 1/4-inch from the edge. The No. XX may be used to punch light channels with 1" minimum inside dimension and 1 3/8" maximum flange. Both punches have optional mounting bases, and are also available as kits with a standard assortment of round punches and dies in a durable plastic box.