Staedtler Mars Drafting Mechanical Pencils 4 pk, 0.3, 0.5, 0.7,& 0.9mm widths, 925WP4 Drafting/technical Pencils, 4 ea- 0.3. 0.5, 0.7 and 0.9 mm tips. 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