The 6 1/2" Triangle Square Up Ruler makes perfect half- and quarter-triangle squares with only two cuts! Fully illustrated and detailed instructions are included for making half-square triangles from 1/2" to 6" finished, or quarter-square triangles from 1" to 6" finished. The ruler is marked in two colors for easy reading. Convenient 1/8 inch, 1/4 inch, 1/2 inch and 1 inch lines for precise measuring. The Ruler is made of heavy gauge acrylic and is laser precise.