Bookbinding machines for office use; Document binding machines for office use; Document laminators for office use; Duplicating machines; Envelope sealing machines for offices; Mechanical pencil sharpeners; Office hole punchers; Office perforating machines; Paper shredders for office use; Paper staplers; Pen holders; Pencil holders; Pencil sharpening machines, electric or non-electric; Staple removers; Staplers being office requisites