"fastening holes" . . . . . "Hole punch#International" . "ISO 838" . . "Hole punch" . "4-hole extension of the ISO 838 standard" . "handheld hole punch" . . . "Hole punch" . . "punch holes" . "ISO 838" . . . . . "punch" . "three-holed punched" . "two-hole punch" . . "hole-punch" . "hole" . . "hole punch" .