The Strip Tube Ruler
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Welcome to Cozy’s Number One Selling Item. Ever.
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 2.5in strips: The Daniela Block. With this great gadget, you can easily make accurate half-square triangles from 1in to 9.5in.