Staedtler Mars Drafting Mechanical Pencils 3 pk, 0.3, 0.5, & 0.7mm widths, 925WP3 Drafting/technical Pencils, 3 ea- 0.3. 0.5, and .07 mm tips. For writing &amp; drawing ISO color Coding on barrel &amp; push-button Adjustable hardness degree indicator &amp; non slip rubber grip zone Chrome-plated metal clip &amp; tip, aluminum hardness degree ring Rigid, cylindrical metal lead sleeve, ideal for use w/rulers &amp; templates