This ingenious ruler is four rulers in one package. The five piece ruler easily snaps together to form a 6", 12" 18" or 24" length. It has clear and accurate markings along with 30, 45 and 60 degree angle markings. You'll love it at home or on the go. It will be your perfect travel companion. All the pieces pack nicely in the felt bag enclosed in the package. For storage we recommend you snap the small end cap onto a larger piece so it does not get lost.