Pattern Graders Set Squares
A strong, 3mm thick, acrylic set square with engraved Metric or Imperial markings. Features grading lines on one edge, whilst the other two edges are calibrated and bevelled. It is used as a guide when drawing geometric shapes such as squares and rectangles. The set square is equipped with markings which allow you to add on seam allowance/grade a pattern up or down. An essential for any design department.