The Pentel Graph Gear Drafting Pencil 500 (0.5mm) – Black is a mechanical pencil that is designed for use in technical drawing and drafting. It has a black plastic body with a knurled grip for comfortable and secure use. The pencil uses 0.5mm lead and features a built-in lead advancement mechanism that allows for precise and accurate drawing. The pencil comes with a replaceable eraser under the push button. The 500 series has a fixed lead sleeve that prevents breakage and helps you see where you’re drawing. Overall, this pencil is a high-quality and reliable tool that is ideal for artists, architects, engineers, and other professionals who require precise and accurate drawing and drafting.