Exceptionally strong and versatile, this Heavy-duty Letter/legal Hole Punch drills three holes through up to 40 sheets of 20 lb. bond. Punches one to four 9/32" holes. Extended handle provides extra leverage. Hole punch features adjustable calibrated chrome paper guide, calibrated chrome faceplate with four-hole metric centers and removable plastic chip tray. Rubber feet on base protect worksurface. Punches up to seven holes using three additional punch heads (sold separately) that can be added.