직각 삼각형 자

This little ruler saves me so much math when piecing triangles. The seam allowance markings are right there on the lines, making half-square and quarter-square cuts quick and accurate.

Finally, a ruler that accounts for seam allowances so I don't have to do the math myself—it saves so much time cutting half-square triangles. The markings are crisp and easy to read, even under my sewing machine light.

The seam allowance lines are printed clearly and make cutting half-square triangles so much faster. I appreciate not having to do the calculations myself—it really helps me avoid mistakes in my quilt blocks.