Sheaffer Sentinel Ballpoint Pen Mechanical Pencil Set - SH/323-9CHThe Sentinel Pen provides writing quality with a click of a button. Perfect for the professional or for practical everyday usage it fits into almost any portfolio and pocket calendar. Set includes ballpoint and . 7mm pencil Sentinel is a reliable writing instrument that comes at an ,. Ballpoint pen's one handed push button activation is convenient durable dependable. Consider it an excellent gift for the student professional, or professional student.