Strip Tube Ruler by Daniela Stout of Cozy Quilt Designs
This plastic ruler makes half square triangles a breeze by combining brilliant engineering with, "the tube technique". It's perfect to use with strips and even includes directions to make our favorite block from 2-1/2 inch strips. With this great gadget, you can easily make accurate half square triangles from 1 in to 9-1/2 inches!
Size: 9.5 inches tall