The classic Koh-I-Noor Rapidomatic Mechanical Pencil, 3mm lead, Red, Blister Carded, 1 Each is back by popular demand! A longtime favorite of architects, engineers and draftsmen. Superior quality features a comfortable knurled grip area and push-button lead advance. Sturdy construction includes a metal pocket clip and lead degree indicator. Comes pre-loaded with lead and eraser. For best performance, use Koh-I-Noor #39505908 HB .9mm replacement lead refills and #563ERS replacement erasers.