Staedtler Mars Drafting Technical Mechanical Pencil,0.5mm width, 92505BK Drafting/Technical Pencil, 0.5mm tip for writing & drawing ISO color Coding on barrel & push-button Adjustable hardness degree indicator & non slip rubber grip zone Chrome-plated metal clip & tip, aluminum hardness degree ring Rigid, cylindrical metal lead sleeve, ideal for use w/rulers & templates