Business Source Heavy-duty Punch, 3-Hole, 30 Sheet Capacity, Black (BSN65625) EachHeavy duty punch drills through up to 30 sheets of 20 lb. paper at a time with two or three holes. Punch features three adjustable punch heads, centering guide with Imperial measurements, a removable chip tray and all steel construction. Punch head measures 9 32". General Information Manufacturer: Business Source Manufacturer Part Number: 65625 Brand Name: Business Source Product Name: Heavy duty 3 hole Punch Marketing Information: Heavy duty punch