Quickly align, straighten and perect any project with this We R Memory Keepers laser Square and Mat! Perfect for scrapbooking, stamping, quilting, school projects and more! Inch and metric measurements. Laser slides from 0 to 12 in (0 to 30.5 cm). Mat and Laser Square fold down for convenient storage. Laser Square can be adjusted to a 90 degree angle or placed together in a straight line.