Measuring and marking with the I-MarkTools family of products is easy: Simply press down on the case to mark.
I-Mark® 16ft Marking Tape Measure
Description: This self-marking 16ft tape measure (with a 3/4-in. blade) has a pre-installed marking cartridge that makes it an ideal measuring tool for DIY-ers, including woodworkers, crafters and other hobbyists. Simply measure and press case to mark.