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 our favorite block from 2-1/2in strips. With this great gadget, you can easily make accurate half square triangles from 1in to 9-1/2in! Watch the Instruction video in the Video Tab to see the versatility of this Ruler. Its Wowza!
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