The Alvin Draft-Matic mechanical pencil has auto-feed lead and color coded barrels is offered in.3mm, .5mm, .7mm, and .9mm width. The professional drafting pencil has knurled stainless steel finger grip for drawing control, rotating window to indicate lead hardness, cushion point to minimize lead breakage and built in eraser under the cap. The 4mm long stainless steel sleeve supports the lead and provides drawing accuracy when using triangles and straightedges.