The Strip Tube Ruler. The Strip Tube Ruler! You asked for it and here it is! This 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 the favorite block from 2½ strips The Daniela Block. With this great gadget you can easily make accurate half square triangles from 1in to 9½!... - The Strip Tube Ruler. |