Estes 302227 Tube Marking Guide<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Easy way to mark fin and launch lug placement lines</li><li>Fin gluing jig included</li><li>Mark reference lines down or around any body tube</li><li>Includes Tube Marking Guide and Fin Marking Tools</li><li>Mark reference lines down and/or around popular Estes rocket body tubes</li><li>Ruler is scaled for either metric or Inches measurements</li><li>Special disks included for marking 3 and 4 fin spacing with precision</li><li>The perfect tool for any serious rocket builder</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LrQ8r5T1L.jpg" noproxy>